Language：English   Publisher：Interdisciplinary Graduate School of Engineering Sciences, Kyushu University  

Herein we report the atomic model of pseudomorphic Fe monolayer on Ru(0001) surface analyzed by low energy electron diffraction (LEED) followed by the formation of c(4×2) structure upon exposure to oxygen. After deposition of the Fe overlayer on Ru(0001) surface at room temperature, the prepared surface was exposed to molecular oxygen (O2). When 2 Langmuir of O_2 is introduced at room temperature on the prepared Fe(111)/Ru(0001) surface, the pseudomorphic p(1×1) structure of the Fe monolayer on the Ru(0001) surface changes to c(4×2) structure.

DOI： 10.5109/5909092

Scopus

CiNii Research

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.susc.2022.122145

Language：English   Publisher：Interdisciplinary Graduate School of Engineering Sciences, Kyushu University  

We report the growth of multilayer boron films on Mo(112) surface by e-beam deposition. Subsequent annealing after deposition shows ordered structure of c(2×2) for 1st layer, which is consistent with an earlier study. Additional deposition of boron atoms revealed no ordered structure for 2nd and 3rd layer as evident from scanning tunneling microscopy and low energy electron diffraction. Scanning tunneling spectroscopy measurements demonstrate the semiconducting nature of the 2nd and 3rd layer with a band gap of 1.2 and 1.4 eV, respectively. On the other hand, 1st layer is metallic. These results show prospects for the practical applications of boron based nanomaterials in the future.

DOI： 10.15017/4795525

CiNii Research

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.susc.2022.122145

Other Link： https://doi.org/10.1016/j.susc.2022.122145

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1002/pssb.202100124

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.susc.2021.121906

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1002/pssb.202100124

Other Link： https://onlinelibrary.wiley.com/doi/10.1002/pssb.202100124

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.susc.2020.121686

Language：English   Publishing type：Research paper (scientific journal)  

The 2D hexagonal structure of tin atoms which is termed stanene is structurally determined on a Cu(111) substrate using low energy electron diffraction (LEED). The structural analysis of Cu{111}-p(2 × 2)-Sn at a coverage of 0.5 at low temperature reveals the relaxation of underlying Cu atoms, which stabilizes the formation of almost zero-buckled Sn atoms forming a honeycomb structure. Our results using quantitative LEED conclusively reveals an ultra-flat stanene structure that complements well with the previous calculations. The detailed structural analysis presented in this article is expected to give in-depth information for characterizing the properties of as-grown stanene.

DOI： 10.1016/j.susc.2019.121498

Language：English   Publishing type：Research paper (scientific journal)  

We have studied growth and magnetism of Fe on graphene and graphite surfaces grown on SiC substrate. Magneto-optical Kerr effect (MOKE) results show that the magnetic dead layer exists on both surfaces. Fe on graphene exhibits larger magnetic anisotropy with almost perfect remanence magnetization above Fe deposition of nominal 7.5 Å thickness. On the other hand, Fe on graphite, with oval nanoparticles, has a low magnetic anisotropy, and hysteresis appears at Fe deposition of nominal 15 Å thickness. X-ray photoelectron measurements suggest that the higher anisotropy and thinner magnetic dead layer for Fe/graphene does not come from the difference in interface mixing. A structural investigation by scanning tunneling microscopy reveals that Fe forms nanoparticles on both carbonized surfaces and that on graphene the aspect ratio of the Fe particles between the height and width is much smaller compared with that on graphite. The shape anisotropy originating from the morphological changes is consistent with the MOKE results. The formation of the low-profile Fe nanoparticle on the graphene indicates the higher surface energy on the graphene/SiC. The different surface energy derived from the interaction between graphene layer and the substrate drastically modifies magnetic properties of Fe overlayers.

DOI： 10.1016/j.apsusc.2019.144209

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.apsusc.2019.144209

Language：English   Publishing type：Research paper (scientific journal)  

Air-conditioning system notably contributes to global warming owing to the huge amount of energy consumption. Moreover, this system uses HFC based refrigerants, which have high global warming potential (GWP). This work investigates the direct and indirect impacts of GWP for commercial and residential air-conditioning systems considering the three widely used HFC based refrigerants. The warming impacts are assessed in terms of cooling load, co-efficient of performance (COP), evaporation temperature, and condensation temperature for three different locations in Japan. The indirect emission of the air-conditioning systems (commercial and residential) for different major cities of Japan is estimated in terms of energy demand and hours of operation. The results of this work indicate that the HFC based refrigerants such as R134a and R32 have lower warming impact compared to that of R410A refrigerant. Furthermore, the economic loss due to refrigerant leakage is also assessed.

Language：English   Publishing type：Research paper (scientific journal)  

We have investigated oxygen induced surface structures on Fe(110) thin film and their magnetic properties using low energy electron diffraction (LEED) and surface magneto-optic Kerr effect (SMOKE). We have determined two chemisorbed structures, p(2 × 2) at 0.25 monolayer (ML) and p(3 × 2) at 0.33 ML using a dynamical LEED analysis. We found that oxygen atoms adsorb in long bridge sites on p(2 × 2) and move to three fold hollow sites on p(3 × 2) due to a steric repulsion. During chemisorption, proceeding the formation of FeO, the topmost surface of Fe film is ferromagnetic and with further oxygen adsorption the surface loses ferromagnetism in accordance with the oxide formation.

DOI： 10.1016/j.susc.2019.03.001

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.susc.2019.03.001

Language：English   Publishing type：Research paper (scientific journal)  

SiC(0001)-(1×1)-H consisting of monohydride is a preferred starting surface structure for synthesis of the two-dimensional materials on SiC(0001). Here we report preparation of the SiC(0001)-(1×1)-H by atomic hydrogen exposure and structure determination of the SiC(0001)-(1×1)-H by a quantitative LEED analysis. Our data show that the SiC(0001)-(1×1)-H is indeed a bulk terminated unreconstructed SiC(0001) surface. The sample morphology was also investigated using AFM. The dominance of one of two possible inequivalent surface terminations of 4H polytype of SiC crystal was confirmed.

DOI： 10.1103/PhysRevB.99.235434

Language：English   Publishing type：Research paper (other academic)  

Optimized growth of Silicon Oxynitride (Si4O5N3) has been obtained in ultrahigh vacuum and growth conditions are confirmed by observing the low-energy electron diffraction (LEED) patterns and Auger electron spectroscopy (AES). All the steps to produce the perfect Si4O5N3 are clarified separately. Specially, initial Si, time for deposition, nitridation and oxidation are crucial points for getting the clear LEED pattern. By observing the LEED patterns and according to the suggestions of previous report to get ideal insulator and SiC interface, we are expecting that the surface is free from the extra-Si or the least amount of Si remains which can be confirmed by scanning tunneling microscopy (STM).

DOI： 10.1109/ICIEV.2018.8641044

Language：English   Publishing type：Research paper (scientific journal)  

The surface alloys of (Pb, Sn) and (Pb, Sb) on Cu(001) obtained via the coadsorption method were independently determined using tensor low-energy electron diffraction (LEED). Both surface alloys were obtained under the p(4 × 4) phase. The determined structures consisted of mixed rows of the adsorbates in a one-dimensional chain arrangement. These mixed rows are buckled differently in each row. The best-fit structure indicates that the Sn or Sb atoms are located on the four-fold hollow sites while the Pb atoms are displaced toward the vacancies. The bond lengths of Sn or Sb atoms with Cu underneath of the alternative mixed chains are reduced by 4.8% or 5.9%, respectively, compared to the bulk values. We consider that, the large reductions of these bond lengths and the tendency of the adsorbates to make alloy at the surface stabilize the structure. The other structural parameters, bonding effects of the surrounding Cu atoms with the adsorbates, and similar characteristics of the elements located in the same period of periodic table are discussed in detail. On the basis of the structural characterization, the mechanisms of the formation of the p(4 × 4) phase are proposed.

DOI： 10.1016/j.susc.2018.06.002

Language：English   Publishing type：Research paper (scientific journal)  

We report the magnetic dead layer at the interfaces between Fe and Si(111) surfaces. We prepared two ultrathin iron-silicides, c(8×4) prepared at 900 K and p(2×2) at 700 K, and clean reconstructed 7×7 surface for the silicon templates. By using magneto-optical Kerr effect, we found that at room temperature the ferromagnetic order appears at 5.5 ML, 8.2 ML, and 10.9 ML for Fe/c(8×4) silicide, Fe/p(2×2) silicide, and Fe/Si(111)-7×7 surface, respectively. From the thickness dependent magnetization measurements, we decided the magnetic dead layer for Fe/c(8×4) silicide, Fe/p(2×2) silicide, and Fe/Si(111)-7×7 to be 3.0 ML, 5.0 ML, and 7.5 ML, respectively. Our results indicate that the c(8×4) iron silicide surface prevents further silicide formation more effectively than the p(2×2) silicide and Si(111)-7×7 surface.

DOI： 10.1380/ejssnt.2018.101]

Language：English   Publishing type：Research paper (scientific journal)  

We report the magnetic dead layer at the interfaces between Fe and Si(111) surfaces. We prepared two ultrathin iron-silicides, c(8×4) prepared at 900 K and p(2×2) at 700 K, and clean reconstructed 7×7 surface for the silicon templates. By using magneto-optical Kerr effect, we found that at room temperature the ferromagnetic order appears at 5.5 ML, 8.2 ML, and 10.9 ML for Fe/c(8×4) silicide, Fe/p(2×2) silicide, and Fe/Si(111)-7×7 surface, respectively. From the thickness dependent magnetization measurements, we decided the magnetic dead layer for Fe/c(8×4) silicide, Fe/p(2×2) silicide, and Fe/Si(111)-7×7 to be 3.0 ML, 5.0 ML, and 7.5 ML, respectively. Our results indicate that the c(8×4) iron silicide surface prevents further silicide formation more effectively than the p(2×2) silicide and Si(111)-7×7 surface.

DOI： 10.1380/ejssnt.2018.101

Language：English   Publishing type：Research paper (other academic)  

Room temperature coadsorption of Pb and Sb on Cu(001) has been studied by low energy electron diffraction (LEED). A p(4×4) structure has been obtained by Pb and Sb at coverages of ∼0.25 and ∼0.125, respectively. This coverage combination is similar to the Pb and Bi study on Cu(001) [1]. This phase is confirmed by clear LEED patterns up to 250 eV. Above this energy some points of p(4×4) phase has been disappeared and only c(4×4) points remain. Based on LEED theory, using computer simulation and similarity of the coverage combination with Pb and Bi study, here a surface alloy model has been proposed and determined. The best-fit structure of the model and its consistency with the experimental results has been discussed in detail.

DOI： 10.1109/ICIEV.2017.8338577

Language：English   Publishing type：Research paper (scientific journal)  

Coadsorption of two heavy metals, Pb and Bi, on Cu(001) at room temperature has been studied using low energy electron diffraction (LEED). c(4 × 4), c(2 × 2), and c(92×2) phases are obtained at different coverages; here, we have determined the best-fit structure of c(4 × 4) phase. This structure can be described as a 1D substitutional chain arrangement of Pb and Bi atoms between the Cu rows along the [110] direction. The unit cell in the two-dimensional (2D) surface consists of one Bi atom, two Pb atoms, and four Cu atoms with one vacancy at the center. The optimal structure parameters demonstrate that Bi atoms are located at fourfold-hollow sites and that Pb atoms are laterally displaced by 0.78 Å from the fourfold-hollow site toward the vacancy. The reasons for the formation of the c(4 × 4) structure upon deposition of Pb and Bi on Cu(001) are discussed in comparison with a similar structure formed by the individual adsorption of Pb on the same substrate.

DOI： 10.1016/j.susc.2017.05.017

Language：English   Publishing type：Research paper (scientific journal)  

An epitaxial single Si₄O₅N₃ layer was formed on a SiC(0001) surface using a step-by-step growth method in an ultrahigh vacuum condition. First, a silicon adsorbed SiC(0001) surface was prepared. The surface was then exposed to NO gas at 950 °C in order to form a Si₂ON₃ layer. Silicon was deposited on this surface and annealed to adjust the amount of adsorbed Si atoms. Finally, the surface was oxidized at 800 °C. The formation of a Si₄O₅N₃ layer was confirmed by low-energy electron diffraction analysis, Auger electron spectroscopy, and scanning tunneling microscopy. Using this procedure, we were able to suppress the growth of graphite-like clusters on the surface, although silicate-like clusters still remained.

DOI： 10.1016/j.susc.2017.03.004

Language：English   Publishing type：Research paper (scientific journal)  

The surface phases formed by coadsorption of Pb and Bi on a single crystal Cu(001) surface have been investigated using low energy electron diffraction (LEED). The complete phase chart is developed after the coadsorption of Pb and Bi with various coverages. Some notable phases obtained are (1×1), c(2×2), c(4×4) and c(9√2×√2). In this study, we have determined the c(2×2) phase. For individual adsorption of both Pb and Bi, we reconfirmed the c(2×2) structure with more accuracy by a tensor LEED analysis that they both occupy the four fold hollow sites. By comparing the structural parameters of coadsorption and individual adsorption, we conclude that the c(2×2) phase of coadsorption is the mixture of separate domains of the c(2×2) phases of Pb and Bi. This study opens a new window of further research into the surface phase determination of coadsorption of Pb and Bi on Cu(001).

Language：English   Publishing type：Research paper (scientific journal)  

DOI： http://iopscience.iop.org/1347-4065/54/12/125701

Language：English   Publishing type：Research paper (other academic)  

The phase evolution of Si on Ni (111) was studied by LEED and AES. A new phase of Si on Ni (111) was found along with the previously reported (√3 × √3)R 30° phase. The surface structure of (√3 × √3)R 30° phase had determined, with chemical composition of Ni₂Si, by using low-energy electron diffraction (LEED) analysis. The obtained nickel silicide would be helpful for understanding the formation of Schottky barrier at semiconductor-metal interface.

DOI： 10.1109/ICIEV.2015.7334025

Language：English   Publishing type：Research paper (scientific journal)  

Abstract The 3×3R30°structures of 2-D nickel silicide and nickel germanide surface alloys on Ni(111) were investigated using quantitative low-energy electron diffraction analysis. The unit cells of the determined silicide and germanide structures contain two Ni atoms and one Si or Ge atom, corresponding to the chemical compositions Ni₂Si and Ni₂Ge, respectively. Both the Si and Ge atoms adopt substitutional face-centered cubic hollow sites to sit on the Ni(111) substrates, and the alloy surfaces exhibit a slight corrugation. The NiSi and NiGe distances were 2.44 and 2.56 Å, respectively, and corresponded well to their respective empirical radii. It was also found that the Ni atoms in the second and third layers moved toward the Si or Ge atom sites from their bulk crystal positions. These results indicate rather strong interactions of the Ni atoms with both the Si and Ge atoms at the surface, leading to trapping of the Si and Ge atoms at the substitutional sites without diffusion into the bulk.

DOI： 10.1016/j.susc.2015.07.024

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/jp512935v

Language：English   Publishing type：Research paper (scientific journal)  

We studied the structural transition for silicon adsorption on Ag(111) by using low-energy electron diffraction (LEED) and Auger electron spectroscopy at various substrate temperatures during deposition. We obtained a single phase of the (4 × 4) structure at 520 K, which was reported as a silicene. At 620 K, the (4 × 4) structure changed to a high-temperature phase which was determined as ( √133 × √133) R 4.3° by LEED, while in preceding works, it was assigned to a quasi (2√3 × 2√3) R 30° or (3.5 × 3.5) R 26° structure. Although the high-temperature phase had not been observed as a single phase, we obtained LEED patterns with a single phase for it, which enabled us to explain all the diffraction spots on the basis of the kinematic theory including double diffraction. The (√133 × √133) R 4.3° was obtained by the multiplication of a (1.35 × 1.35) R 9.9° subunit cell. We concluded that the (2 √3 × 2√3) R 30° and (3.5 × 3.5) R 26° phases could instead be represented as a ( √133× √133) R 4.3° phase, and we proposed a possible atomic model.

DOI： 10.7567/JJAP.54.015502

Language：English   Publishing type：Research paper (scientific journal)  

The (2 × 1) structure of the two-dimensional nickel silicide surface alloy on Ni(111) was investigated using quantitative low-energy electron diffraction analysis. The unit cell of the determined silicide structure contains one Si and one Ni atom, corresponding to a chemical formula of NiSi. The Si atoms adopt substitutional face-centered cubic hollow sites on the Ni(111) substrate. The Ni-Si bond lengths were determined to be 2.37 and 2.34 Å. Both the alloy surface and the underlying first layers of Ni atoms exhibit slight corrugation. The Ni-Si interlayer distance is smaller than the Ni-Ni interlayer distance, which indicates that Si atoms and underlying Ni atoms strongly interact.

DOI： 10.7567/JJAP.54.125701

Language：English   Publishing type：Research paper (scientific journal)  

DOI： doi:10.7567/JJAP.54.015502

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/jp503851k

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 0.1016/j.susc.2014.06.007

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/jp503851k

Language：English   Publishing type：Research paper (scientific journal)  

Inspired by the fruitful results based on graphene, two dimensional structures of group-IV elements (Si, Ge) are currently the most investigated materials in physics and nano science. Silicene, the silicon analogy of graphene, had already been synthesized experimentally, but the germanium analogy of graphene has not been synthesized experimentally yet. Only a few theoretical works predicted that graphene like 2-D honeycomb structure of germanium is stable with low buckling. We experimentally observed the phase evolutions for germanium growth on Ag(111) by low energy electron diffraction. We observed that the phase evolutions were strongly dependent on the amount of germanium coverage on Ag(111). We obtained a (9√3 × 9√3)R 30° pattern by germanium adsorption on Ag(111) at RT and the pattern become clear after annealing at 415 K. The (9√3 × 9√3)R 30° pattern is analogous to the (6√3 × 6√3)R 30° pattern of graphene formation on SiC(0001). We also observed the atomically resolved STM image after one monolayer germanium adsorption on Ag(111). By the observation on the STM image, we observed a honeycomb structure and by further close observation on larger area, we observed the (9√3 × 9√3)R 30° moire structure. On the basis of the LEED and STM results, we have proposed an atomic model for germanene, the germanium analogy of graphene, growth on Ag(111).

Language：English   Publishing type：Research paper (scientific journal)  

A new silicon oxynitride layer was formed on a 6H-SiC(0001) surface by a nitrogen oxide treatment. The atomic structure of this single layer on the SiC(0001) substrate was determined by means of low-energy electron diffraction (LEED) analysis. The surface layer has a (3×3) R30° periodicity. Its LEED I(E) spectra are different from those of the previously reported silicon oxynitride layer which has a Si₄O₅N₃ composition [Phys. Rev. Lett. 98 (2007) 136105]. The best-fit structure has a single layer of Si₂ON₃ composition terminated by O bridges. The Si-N layer of the determined structure has the same structure as that in the Si₄O₅N₃ surface. The obtained Si₂O₃ structure would be useful for preparing an ideal SiC-insulator interfaces with a low interfacial density of states.

DOI： 10.1016/j.susc.2014.06.007

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/jp406906k

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1021/jp406906k

Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1088/1742-6596/430/1/012129

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1088/1742-6596/430/1/012129

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.elspec.2012.02.009

Language：Japanese   Publishing type：Research paper (scientific journal)  

Photoemission Magnetic Circular Dichroism using Laser
We report magnetic circular dichroism (MCD) on ultrathin films using lasers as excitation sources. By using threshold photoemission, we can obtain high MCD asymmetry. On the other hand, when the laser photon energy is far away from the threshold, the MCD asymmetry is small. The MCD asymmetry depends also on the magnetization, and MCD is larger for the perpendicularly magnetized films. The reason for the enhanced MCD asymmetry near the threshold is spontaneous momentum and energy selection in the photoelectron excitation. The MCD dependence on the magnetization direction is explained by the polarization change of reflected light, which is negligible for x-ray MCD. Also shown is the photoemission electron microscope observation of magnetic domains using lasers.

DOI： 10.3131/jvsj2.52.589

Language：Japanese   Publishing type：Research paper (scientific journal)  

Photoemission Electron Microscopy using Magnetic Circular Dichroism with Laser
We report on laser photoemission electron microscopy (PEEM) using magnetic circular dichroism (MCD). Although MCD asymmetry in valence band is generally very small, it can be enhanced using threshold photoemission. We give experimental results for Ni/Cu(001) to show enhanced MCD effect near the threshold. Possible reasons for the mechanism of the enhancement are its energy and angle limited measurement of a specific electron energy state in the threshold photoemission, which can be achieved without an energy analyzer. As an application of the enlarged MCD using laser, we show magnetic domain imaging using PEEM. Due to its high brilliance, the laser MCD PEEM can measure the magnetic domain in a real time, but its explosive photoemission in a short period would deteriorate the special resolution. Finally we show our effort to make time resolved MCD-PEEM experiment in sub ps time resolution, whose time resolution would be much better than that of the state-of-art experiment using synchrotron with MCD-PEEM.

DOI： 10.1380/jsssj.30.332

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.susc.2008.04.003

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1063/1.2437165

Language：Others   Publishing type：Research paper (scientific journal)  

DOI： 10.1016/j.susc.2006.07.030

Event date： 2015.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：早稲田大学　東京   Country：Japan  

Event date： 2014.9

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：中部大学 春日井市   Country：Japan  

Event date： 2012.11

Presentation type：Oral presentation (general)  

Venue：Hong Kong  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東海大学   Country：Japan  

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：徳島大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：広島国際会議場   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：広島国際会議場   Country：Japan  

Event date： 2024.3

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Country：Japan  

Event date： 2024.2

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Venue：東京大学物性研究所   Country：Japan  

Event date： 2024.2

Language：Japanese   Presentation type：Oral presentation (invited, special)  

Venue：東京大学物性研究所柏の葉サテライト   Country：Japan  

近年単層ホウ素薄膜であるボロフェンが盛んに研究されている。これらボロフェンは主に固溶体を形成しない貴金属や白金族の表面上で作製されているが、ホウ素が多数の同素体を持つことを反映して多相共存することが多い。我々はホウ素が固溶する遷移金属であるNiや高融点金属であるW、Moの表面においてホウ素薄膜を作製し、単相構造を見出している。
Figure1はW(100)上およびMo(112)上に成長させたホウ素のSTM像および低速電子回折により求めた構造モデルである[1,2]。ホウ素はW(100)の窪みに結合しWBホウ化物を形成する。一方、Mo(112)上ではホウ素は表面上の溝に沿ってB4クラスターを形成する。W(110)上ではボロフェン類似の構造が形成される。いずれのホウ素薄膜も単一相であり、1000 ℃程度の加熱に対して安定で、ホウ素がバルク内部へ拡散しない。貴金属や白金族の表面上のボロフェンが数百℃でバルク内部へ拡散するのと対照的である。ホウ素薄膜は遷移金属と表面で強く結合したことにより安定化していると考えられる。

Event date： 2023.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Nagoya Congress Center   Country：Japan  

Event date： 2023.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：アルカス佐世保   Country：Japan  

Event date： 2023.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：アルカス佐世保   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2023.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2022.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Sapporp Convention Center, Sapporo, Japan   Country：Japan  

Event date： 2022.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Sapporp Convention Center, Sapporo, Japan   Country：Japan  

Event date： 2022.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：佐賀大学本庄キャンパス   Country：Japan  

Event date： 2022.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：佐賀大学本庄キャンパス   Country：Japan  

Event date： 2022.3

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2021.4

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：England(Online)   Country：United Kingdom  

Event date： 2020.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：オンライン   Country：Japan  

Event date： 2020.12

Language：English   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2020.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

W(112)上のホウ素吸着構造

Event date： 2019.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡大学、福岡市   Country：Japan  

Event date： 2019.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2019.3

Language：Japanese   Presentation type：Oral presentation (general)  

Country：Japan  

Event date： 2018.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡大学   Country：Japan  

Event date： 2018.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡大学   Country：Japan  

Event date： 2018.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡大学   Country：Japan  

Event date： 2018.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡大学   Country：Japan  

Event date： 2018.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州工業大学,北九州市   Country：Japan  

本研究ではFe(110)上に形成する酸素吸着構造と磁性との相関を調べるべく、LEED観測、LEED I-V測定による構造評価とSMOKE測定による磁性評価を行った。(2×2)構造、(3×2)構造についてはLEED I-Vによる構造解析から詳細な構造を特定することができ、それぞれ0.25 ML、0.33 MLの被覆率を持っていた。SMOKE測定の結果から(2×2)構造、(3×2)構造を形成した低い酸素曝露量においては鉄の磁性に大きな変化はなく、多量の酸素を曝露し酸化が進行すると鉄の磁性に大きな変化が見られた。
これら結果から(2×2)構造、(3×2)構造を形成した低い酸素曝露量において酸素原子の吸着は非活性に進行し、Fe(110)に対して化学吸着をしていることが確認できた。
酸素原子が3配位型の構造となっていた(3×2)構造は酸化鉄を形成する前駆体として作用し、このときの被覆率0.33 ML以上の酸素原子が吸着すると化学吸着過程を外れ、酸化が進行することが推測された。

Event date： 2017.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：宮崎観光ホテル 宮崎市   Country：Japan  

Event date： 2017.10

Language：English   Presentation type：Oral presentation (general)  

Venue：Tsukuba International Congress Center, Tsukuba   Country：Japan  

Event date： 2017.10

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：Tsukuba International Congress Center, Tsukuba   Country：Japan  

Event date： 2017.10

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：Tsukuba International Congress Center, Tsukuba   Country：Japan  

Event date： 2017.9

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：福岡国際会議場 福岡市   Country：Japan  

Event date： 2016.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡大学 福岡市   Country：Japan  

Event date： 2016.9

Language：English   Presentation type：Oral presentation (general)  

Venue：Portola, Hotel & Spa Monterey   Country：United States  

Event date： 2016.8

Language：English   Presentation type：Oral presentation (general)  

Venue：BEXCO, Busan   Country：Korea, Republic of  

Event date： 2016.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学   Country：Japan  

Event date： 2016.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州大学   Country：Japan  

Event date： 2015.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州工業大学 北九州   Country：Japan  

Event date： 2015.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州工業大学 北九州   Country：Japan  

Event date： 2015.9

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：関西大学 大阪・吹田市   Country：Japan  

Event date： 2015.9

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：関西大学　大阪・吹田市   Country：Japan  

Event date： 2015.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州工業大学 北九州   Country：Japan  

Event date： 2015.6

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：九州工業大学 　北九州   Country：Japan  

Event date： 2014.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大分大学 大分   Country：Japan  

Event date： 2014.12

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：大分大学 大分   Country：Japan  

Event date： 2013.12

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：Sheraton Hotel Hawaii   Country：United States  

Event date： 2013.12

Language：English   Presentation type：Oral presentation (general)  

Venue：Sheraton Hotel Hawaii   Country：United States  

Event date： 2013.12

Language：English   Presentation type：Symposium, workshop panel (public)  

Venue：Sheraton Hotel Hawaii   Country：United States  

Event date： 2013.1

Presentation type：Symposium, workshop panel (public)  

Venue：2013年に本放射光学会   Country：Japan  

Language：Japanese   Presentation type：Symposium, workshop panel (public)  

Venue：長崎大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：福岡大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：東京大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：徳島大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：徳島大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：長崎大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：青山学院大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：青山学院大学   Country：Japan  

Language：Japanese   Presentation type：Oral presentation (general)  

Venue：青山学院大学   Country：Japan  

Language：Japanese  

28pPSA-47 Development of a low energy electron diffraction apparatus using field emitters sharpened by field-assisted reactive gas etching

Language：Japanese  

28pPSA-46 Structure determination of iron monolayer on Mo(110)surface by LEED and its magnetic

Language：Japanese  

Surface structure analysis of SiON on SiC(0001) by LEED

Language：Japanese  

26pPSA-26 Structure determination of graphene on Ni and Cu by LEED

Language：Japanese  

23pJB-7 Investigation of Fe/W(110) by x-ray magnetic circular dichroism

Language：Japanese  

23pJB-3 Magnetic property of iron phthalocyanine on Co/Cu(001)

Language：Japanese  

25aTH-6 Magnetic property of iron phthalocyanine on ferromagnetic thin films.

Language：Japanese  

20aGL-8 Study of Magnetic Thin Films using Threshold Photoemission Magnetic Circular Dichroism

Language：Japanese  

30aTF-8 The studies for structures and magnetizations of iron-nitride thin films formed on Cu(001) surface

Language：Japanese  

30aTF-3 Two Photon Photoemission Magnetic Circular Dichroism in Ni ultrathin films

Language：Japanese  

30aTF-3 Two Photon Photoemission Magnetic Circular Dichroism in Ni ultrathin films

Language：Japanese  

30aTF-8 The studies for structures and magnetizations of iron-nitride thin films formed on Cu(001) surface

Language：Japanese  

22pPSB-32 XMCD study of iron-nitride thin films formed on Cu(001) surface

Language：Japanese  

24pWK-12 Structure and magnetic property of FeN thin film formed on Cu(001) surface

Language：Japanese  

24aRJ-9 Photoemission Magnetic Dichroism using Laser and Magnetic Domain Observation

Language：Japanese  

24pWK-12 Structure and magnetic property of FeN thin film formed on Cu(001) surface

Language：Japanese  

28aSC-3 Enhanced Magnetic Circular Dichroism near the Fermi Level by visible and ultraviolet laser

Language：Japanese  

20aYB-5 Electron injection into Fe/Cu(001) upon alkali metal adsorption

Language：Japanese  

20aYB-5 Electron injection into Fe/Cu(001) upon alkkali metal adsorption

Language：Japanese  

24pXD-2 Spin reorientation transition of Co thin films on vicinal Cu(1 1 17) induced by surface modification

Language：Japanese  

24pXD-1 Opposite spin reorientation driven by magnetic orbital moment : Cu/Ni/Cu(001) and Cu/Ni/O/Cu(001)

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：2

Number of peer-reviewed articles in Japanese journals：3

Proceedings of International Conference Number of peer-reviewed papers：1

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：4

Number of peer-reviewed articles in Japanese journals：3

Proceedings of International Conference Number of peer-reviewed papers：1

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：2

Number of peer-reviewed articles in Japanese journals：0

Proceedings of International Conference Number of peer-reviewed papers：1

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：1

Number of peer-reviewed articles in Japanese journals：1

Proceedings of International Conference Number of peer-reviewed papers：0

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：73

Type：Peer review 

Number of peer-reviewed articles in foreign language journals：2

Number of peer-reviewed articles in Japanese journals：0

Proceedings of International Conference Number of peer-reviewed papers：3

Proceedings of domestic conference Number of peer-reviewed papers：0

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

Number of participants：10,000

Type：Competition, symposium, etc. 

Number of participants：10,000

Type：Competition, symposium, etc. 

Number of participants：10,000

Type：Competition, symposium, etc. 

Type：Competition, symposium, etc. 

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