Kyushu University [Fuminori Honda (Professor) Central Institute of Radioisotope Science and Safety Management, ]

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Fuminori Honda
Professor
Central Institute of Radioisotope Science and Safety Management
Last modified date：2024.04.25

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Total Priod of education and research career in the foreign country

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1.	Masahito Yoshizawa, Yusei Shimizu, Yoshiki Nakanishi, Yoshiya Homma, Ai Nakamura, Fuminori Honda, and Dai Aoki, Emergence of Elastic Softening Featuring Ultra-Slow Dynamics Around Magnetic Critical Endpoint in UCoAl, J. Phys. Soc. Jpn., 10.7566/JPSJ.92.104603, 92, 10, 104603-1-104603-11, 2023.09, [URL].
2.	Hiroki Fujibayashi Katsuki Kinjo Genki Nakamine Shunsaku Kitagawa Kenji Ishida Yo Tokunaga Hironori Sakai Shinsaku Kambe Ai Nakamura Yusei Shimizu Yoshiya Homma Dexin Li Fuminori Honda Dai Aoki, Low-Temperature Magnetic Fluctuations Investigated by 125Te-NMR on the Uranium-Based Superconductor UTe2, J. Phys. Soc. Jpn., 10.7566/jpsj.92.053702, 92, 5, 053702-1-053702-5, 2023.05, [URL], We report on the crystal structure and electronic properties of the heavy fermion superconductor UTe2 at high pressure up to 11GPa, as investigated by X-ray diffraction and electrical resistivity experiments. The X-ray diffraction measurements under high pressure using a synchrotron light source reveal anisotropic linear compressibility of the unit cell up to 3.5 GPa, while a pressure-induced structural phase transition is observed above PO–T ∼ 3.5–4 GPa at room temperature, where the body-centered orthorhombic crystal structure with the space group Immm changes into a body- centered tetragonal structure with the space group I4=mmm..
3.	J Valenta N Tsujii H Yamaoka F Honda Y Hirose H Sakurai N Terada T Naka T Nakane T Koizumi H Ishii N Hiraoka T Mori, Unusually strong electronic correlation and field-induced ordered phase in YbCo2, Journal of Physics: Condensed Matter, 10.1088/1361-648x/acca5a, 35, 28, 285601-1-285601-10, 2024.04, [URL], We report the first study of electrical resistivity, magnetization, and specific heat on YbCo2. The measurements on a single-phased sample of YbCo2 bring no evidence of magnetic ordering down to 0.3 K in a zero magnetic field. The manifestations of low Kondo temperature are observed. The specific heat value divided by temperature, C/T, keeps increasing logarithmically beyond 7 J/mol K2 with decreasing temperature down to 0.3 K without no sign of magnetic ordering, suggesting a very large electronic specific heat. Analysis of the magnetic specific heat indicates that the large portion of the low-temperature specific heat is not explained simply by the low Kondo temperature but is due to the strong intersite magnetic correlation in both the 3d and 4f electrons. Temperature-dependent measurements under static magnetic fields up to 7 T are carried out, which show the evolution of field-induced transition above 2 T. The transition temperature increases with increasing field, pointing to a ferromagnetic character. The extrapolation of the transition temperature to zero field suggests that YbCo2 is in the very proximity of the quantum critical point. These results indicate that in the unique case of YbCo2, the itinerant electron magnetism of Co 3d-electrons and the Kondo effect within the vicinity of quantum criticality of Yb 4f-local moments can both play a role..
4.	Hiroto Fukuda, Takatsugu Koizumi, Yoshiki J. Sato, Yusei Shimizu, Ai Nakamura, Dexin Li, Yoshiya Homma, Atsushi Miyake, Dai Aoki, Masashi Tokunaga, Ryoma Kato, Masanobu Shiga, Tatsuya Kawae, Fuminori Honda, Physical Properties of a New Ternary Compound RPt3Al5 (R = rare earth), New Phys.: Sae Mulli, doi.org/10.3938/NPSM.73.1135, 73, 1135-1139, 2023.12, [URL], Electronic properties of a new ternary f-electron system RPt3Al5 (R: rare earth elements) have been investigated. RPt3Al5 crystalizes in the CePt3Al5-type orthorhombic structure where R atoms form 1-dimensional chains along the b-axis. LaPt3Al5 shows superconductivity below 0.4 K, while others show magnetic ordering. CePt3Al5 orders antiferromagnetically below TN = 1.2 K with spontaneous moment and shows successive magnetic transition at Tm = 0.9 K. The nearly divalent antiferromagnet EuPt3Al5 indicates an unusual valence cross-over behavior into the nearly trivalent state under high pressure of 9 GPa. It is also found that most of RPt3Al5 orders antiferromagnetically and, in some cases, shows characteristic features in magnetic susceptibility, where the broad maximum appears slightly above TN, reﬂecting the low-dimensional nature..
5.	Fuminori Honda, Shintaro Kobayashi, Naomi Kawamura, Saori I. Kawaguchi, Takatsugu Koizumi, Yoshiki J. Sato, Yoshiya Homma, Naoki Ishimatsu, Jun Gouchi, Yoshiya Uwatoko, Hisatomo Harima, Jacques Flouquet, and Dai Aoki, Pressure-induced Structural Phase Transition and New Superconducting Phase in UTe2, J. Phys. Soc. Jpn., 10.7566/JPSJ.92.044702, 92, 4, 044702-1-044702-10, 2023.03, We report on the crystal structure and electronic properties of the heavy fermion superconductor UTe2 at high pressure up to 11GPa, as investigated by X-ray diffraction and electrical resistivity experiments. The X-ray diffraction measurements under high pressure using a synchrotron light source reveal anisotropic linear compressibility of the unit cell up to 3.5 GPa, while a pressure-induced structural phase transition is observed above PO–T ∼ 3.5–4 GPa at room temperature, where the body-centered orthorhombic crystal structure with the space group Immm changes into a body- centered tetragonal structure with the space group I4=mmm..

1.	Fuminori Honda, The exotic valence state of rare-earth compounds under high pressure, Muroran-IT Rare Earth Workshop 2023, 2023.11.
2.	H. Fukuda, F. Honda,　T. Koizumi, Y. Shimizu, Y. J. Sato, A. Nakamura, D. X. Li, Y. Homma, A. Miyake, M. Tokunaga, M. Shiga, T. Kawae, D. Aoki, Physical properties of a new ternary compound RPt3Al5 (R = rare earth element) and UPt3Al5, International Conference on Strongly Correlated Electron Systems 2023 (SCES 2023), 2024.07.
3.	F. Honda,　S. Kobayashi, N. Kawamura, S. I, Kawaguchi, J. Gouchi,　Y. Uwatoko, J. Flouquet, D.Aoki, Pressure-induced Structural Phase Transition and New Superconducting Phase in UTe2, International Conference on Strongly Correlated Electron Systems 2023 (SCES 2023), 2024.07.