Studies of Electronic Properties by Using High Magnetic Field

利用强磁场研究电子特性

• 批准号: 04302017
• 负责人: DATE Muneyuki
• 金额: $ 6.02万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Co-operative Research (A)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04302017/
• 关键词: pulsed high magnetic field; electrical flux compression; hybrid magnet; heavy Fermion; dense Kondo materials; high T_c superconductors; high field magnetism; high field ESR; ハルデン物質; 高濃度近藤効果; 超伝導物質

Research results have been obtained successfully in 1993 at three big high field facilities, Tohoku University, University of Tokyo and Osaka University. Each institution has developed its characteristic technology. At Osaka university, for example, it becomes possible to measure a high sensitive magnetometer at liquid helium temperature by use of Second Pulse Magnet and a new quantum effect can be expected. Research results through the standard systems are described as follows.In rare earth or actinide compounds many measurements have been done. A sharp transition due to a change in carrier concentration has been observed in the magnetization curve of UPd_2Al_3 at the critical field where heavy Fermion state is broken. A systematic research has been done in Ce_xLa_<1-x>P by changing Ce-concentration. A clear de Haas van Alphen oscillation has been observed for the first time in the pulsed magnetic field in diluted region. It becomes clear that the extremal cross section in diluted systems reduce to about half value of that in CeP.The ground state of Ce^<3+> ion is found to be GAMMA_7 by the ESR results in the diluted region and high field ESR clarified the ground state in CeP is mixing state of GAMMA_7 and GAMMA_8.Intensive measurements have been done in R_2CuO_4 as a parent materials of high T_c superconductors. A transition like a spinflop magnetization has been observed in Sm_2CuO_4 around 40 T when the field is applied along c-axis. Antiferromagnetic resonance in Gd_2CuO_4 makes it clear that easy axis cants from [100] by only 2 degrees and it may come from the canting of Cu spin.Many investigators discussed the status of Japanese high field society in the world. All investigators aree to the opinion that more effective investment and research system are necessary to maintain the advanced position against the facilities in Europe and United States.

研究结果已于1993年在Tohoku University，Tokyo University of Tokyo University和Osaka University的三个大型高地设施中成功获得。每个机构都开发了其特征技术。例如，在大阪大学，可以通过使用第二脉冲磁体在液态氦气温度下测量高灵敏磁力计，并且可以预期产生新的量子效应。通过标准系统的研究结果如下。在较重的费米态损坏的关键场上，在upd_2al_3的磁化曲线中观察到了由于载体浓度的变化而引起的急剧过渡。通过更改CE浓度，在CE_XLA__ <1-X> P中进行了系统的研究。在稀释区域的脉冲磁场中，首次观察到了清晰的de haas van alphen振荡。很明显，稀释系统中的极端横截面降低至CEP中的一半值。CE^<3+>离子的基态被ESR被ESRγ_7降低到稀释的区域，并阐明了高场ESR。 CEP中的基态是混合γ_7的状态和γ_8。在R_2CUO_4中，已作为高T_C超导体的父材料进行了密集的测量。当沿C轴应用场时，在40 t左右的SM_2CUO_4中观察到了像Spinflop磁化的过渡。 gd_2cuo_4中的抗磁性共振清楚地表明，[100]的轴心很容易受到2度，这可能来自Cu Spin的倾斜。许多调查人员讨论了日本高地社会在世界上的地位。所有研究人员都认为，更有效的投资和研究系统对于维持针对欧洲和美国设施的先进地位是必要的。

项目成果

T.Kakeshita: "Effect of Magnetic Fields on Athermal and Isothermal Martensitic Transformations in Fe-Ni-Mn Alloys" Materials Transactions.JIM.34. 415-422 (1993)

T.Kakeshita：“磁场对 Fe-Ni-Mn 合金中无热和等温马氏体转变的影响”Materials Transactions.JIM.34。

H.Nakotte: "Electronic Properties of UCo_4B." Int.J.Mod.Phys.7. 838-841 (1993)

H.Nakotte：“UCo_4B 的电子特性。”

K.Kindo: "Oscillatory High-Field Magnetization in LaP Doped with Ce." J.Phys.Soc.Jpn.62. 4190-4193 (1993)

K.Kindo：“掺杂 Ce 的 LaP 中的振荡高场磁化。”

H.Hori,S.Endo,K.Yamamoto,H.Mikami,A.Yamagishi.M.Date: "High pressure magneto-optics in pulsed high magnetic fields" Physica B. 177. 71-75 (1992)

H.Hori,S.Endo,K.Yamamoto,H.Mikami,A.Yamagishi.M.日期：“脉冲强磁场中的高压磁光”Physica B. 177. 71-75 (1992)

H.Nakotte: "Electronic Propertics of UCo_4B." Int.J.Mod.Phys.7. 838-841 (1993)

H.Nakotte：“UCo_4B 的电子特性。”