Kyushu University Academic Staff Educational and Research Activities Database
List of Reports
Tatsuya Kawae Last modified date:2024.04.20

Associate Professor / Applied Physics / Department of Applied Quantum Physics and Nuclear Engineering / Faculty of Engineering


Reports
1. 10aAV-1 Magnetism and electronic structure of non-doped and V-doped TiO_2 nanoparticles.
2. 7aPS-101 Magnetization of CoMoO_4 at extremely low temperatures.
3. 9pPSA-138 The Size Dependence of Josephson Effect in Superconducting Point Contact.
4. 7aPS-148 Magnetic property of K_2Cu_3O(SO_4)_3 : A new compound of three-dimensional spin-1/2 tetrahedra system.
5. 27aPS-86 Specific heat measurements at extremely low temperatures of isolated tetrahedral spin system of Cu^ions K_4Cu_4X_O (X=Cl,Br).
6. 27pCG-7 Role of Chromium in metal-insulator transition of V_2O_3 nanocrystals.
7. 28pPSA-66 Study of hydrogen absorption in Pd using inelastic electron spectroscopy.
8. 28pPSA-69 Competition between Josephson effect and Kondo effect in vanadium point-contact.
9. 30aBF-11 Contribution of atom tunneling to hydrogen absorption in Pd.
10. 27aCJ-5 Specific heat and magnetization measurements in high quality single crystal of PrAg_2In.
11. Nonlinear Susceptibility Measurements in Pr_LaPb_3 with Γ_3 Doublet Ground State.
12. Low temperature properties and characterization of PrAg_2In.
13. Precise Susceptibility Measurements in Pr Compounds with Γ_3 Doublet Ground State at Low temperatures.
14. Ferromagnetic Co ions in Co-doped rutile TiO_2.
15. Magnetic Properties and Chromism Control of CoMoO_4.
16. Magnetic transition in triangular-lattice compound CuOHCl.
17. Size effects of differential conductance in point-contact Josephson junctions..
18. Effect of pressure on metamagnetism in YbCo_2Zn_ and YbNi_3Ga_9.
19. Hydrogen adsorption into Pd at liquid hydrogen temperature.
20. Magnetic transition in K4Cu4OCl10: A model system of three-dimensional spin-12 tetrahedra
Isolated spin tetrahedral systems with weak intertetrahedral couplings, as have been reported for Cu2Te2O5X2 (X = Cl, Br) and the related compound Cu4Te5O 12Cl4, have received much attention recently because they represent an interesting class of magnets that consist of weakly coupled magnetic clusters and, in particular, they can directly demonstrate the interplay of intertetrahedral couplings with built-in tetrahedral frustration. However, there is much debate about the structural low dimensionality of the Cu-Te-O-Cl(Br) compounds and its effect on the magnetism of the material. Here, we present a model spin tetrahedral system K4Cu4OCl 10, with almost isotropic magnetic coupling within the tetrahedron and three-dimensional connection of the tetrahedra. The system enters a spin-singlet state with a susceptibility maximum at Tmax = 11 K, and then enters an antiferromagnetic order at TN = 4.4 K. The ratio TN/Tmax = 0.40 is close to the TN/T max = 0.38 for Cu2Te2O5Br 2, which is viewed as an indicator of closeness to quantum criticality. Evidence in muon-spin rotation or relaxation suggests an incommensurate ordering. This work shows that the previously revealed ground state in aniso.
21. 26aPS-70 Magnetic transition in spin-tetrahedron paratacamite.
22. 26aPS-94 Magnetic property measurements at extremely low temperatures of isolated tetrahedral spin system of Cu^ ions K_4Cu_4Cl_O II.
23. 26pPSA-58 Size effect of transport property in superconductive nanocontact (Sn,Pb).
24. 26pPSA-61 Study of hydrogen absorption process into Pd nanowire in liquid hydrogen by electrical conductivity measurements.
25. 29aXK-6 Study of ferromagnetism in Pd nano-wire by magnetoresistance measurements.
26. 26aXY-5 Unconventional spin freezing in a highly two-dimensional kagome antiferromagnet.
27. 27aPS-92 A Development of the Magnetization Measurements System down to T=0.36K with SQUID Magnetometer.
28. 18aFN-8 Measurements of zero bias anomaly in Pd atomic-scale wire.
29. 20aPSA-71 Phase transition phenomena in the PrPb_3 quadrupolar phase driven by the field induced multipolaxs.
30. 20pPSA-67 Measurements of the electrical conductivity of Pd nenowire in liquid hydrogen.
31. 20aPSB-42 Development of ^3He insert for Low-temperature Measurements with SQUID Magnetometer II.
32. 21aFH-9 Metamagnetic behavior of YbCo_2Zn_ under pressure.
33. 21aPSB-34 Metal-insulator transition of Fe_3O_4 nanocrystals.
34. Ac-susceptibility and specific heat mesurements in Pr1-xLaxPb3(0.1≦x≦0.9).
35. Effect of Co Substitution on 2d-HAF MnF2Urea.
36. Magnetic Properties and NMR Study of a Spin-Ladder (C_5H_N)_2CUCl_4.
37. 24aPS-25 Effect of Pressure and Substitution on PrPb3.
38. 24pPSB-51 Magnetic measurement of HoNi2B2C under high pressure (2).
39. 24pW6-4 Specific Heat and Electric Resistivity Measurements in Pr_xLa_Pb_3 (x=0.01,0.03,0.05).
40. 25aPS-12 Structural Analysis of S = I Haldane Compound NDMAP under Pressures.
41. 25aPS-84 Magnetic Measurement of Rare Earth Metal Ferromagnetic Gd Under High Preesure.
42. Pressure effect of magnetism and superconductivity in HoNi_2B_2C.
43. Specific heat measurements under pressure by use of a clamp cell.
44. PrCo2Si2の磁気相図と磁気抵抗効果.
45. 1P-PSB-35 Heat Capacity of Haldane System under Pressure.
46. Nonlinear Resistivity of Superconducting Aluminum film.
47. 1P-PSB-64 Pressure elect of Genuine organic Ferromagnet p-CDTV.
48. 1a-pS-32 Heat Capacity and Susceptibility Measurements of PrX_2 ( X = Zn, Cu ).
49. 3a-YE-4 Magnetic Properties of Haldane System TMNIN (Zn) with finite chain length.
50. Pressure Effects on Intermolecular Interactions in a Genuine Organic Ferromagnet.
51. K TAKEDA, K MIYAKE, M HITAKA, T KAWAE, N YAGUCHI, M MEKATA, THERMAL-ANALYSIS OF FREEDOM OF SPIN IN PARTIALLY DISORDERED STATE OF THE ANTIFERROMAGNETIC TRIANGULAR LATTICE IN CUFEO2, JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, Vol.63, No.6, pp.2017-2020, 1994.06, The partially disordered spins in the triangular antiferromagnetic lattice in CuFeO2 have been studied by heat capacity measurements. A cusp and a sharp peak in the heat capacity curve were observed at T(N1) = 14.0 +/- 0.5 K and T(N2) = 11.0 +/- 0.5 K, respectively. The analysis of heat capacity revealed that the magnetic entropy associated with the anomaly in the heat capacity around T(N2) is attributable to the disordering of one-fifth of Fe3+ spins. The present result is discussed in comparison with partially disordered states of CeSb and PrCo2Si2, anisotropic spin systems with frustration. The heat capacity cusp around T(N1) is compared with the characteristic thermal behavior for frustrated spin systems..