ESR Study of Heavy Fermion State

重费米子态的ESR研究

• 批准号: 02640249
• 负责人: CHIBA Yoshiaki
• 金额: $ 1.28万
• 依托单位: Miyagi University of Education
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02640249/
• 关键词: electron spin resonance; Neodymium copper oxide; antiferromagnetic resonance; staggered field; High field Magnetization; electron type hihg-Tc superconductor; heavy fermion state; ネオジウム銅酸化物; Nd_2CuO_4; gシフト; Staggered Field

1)High field magnetization of Nd_2CuO_4 single crystal Is lnvestigated and the spin-flop and unidentified phase transitions are found. These transitions are attributed to those In the Nd spin system but the Interaction between Cu and Nd spins. ts not negligible to the transitions. The ESR measurement supports the present model.2)Anomalous electron spin resonance observed in Nd_2CuO_4 is attributed to antiferromagnetic resonance(AFMR)of Nd spins in the Nd-Cu spin network. The anomaly comes from the staggered field due to Cu spins on the Nd-site. The Cu spins form a tight antiferromagnetic spin network and are almost at rest during the Nd-resonance. The staggered field acts as an additional anisotropy field on the Nd spin. Various magnetic parameters in AFMR are in accord with those determined by the high field magnetization study.

1)研究了Nd_2CuO_4单晶的高场磁化强度，发现了自旋翻转和未识别的相变，这些相变是由Nd自旋系统中的自旋翻转引起的，而不是由Cu和Nd自旋之间的相互作用引起的。这对过渡是不可忽略的。ESR测量结果支持本模型。2）Nd_2CuO_4中观察到的反常电子自旋共振归因于Nd-Cu自旋网络中Nd自旋的反铁磁共振（AFMR）。这种异常来自于Nd位上Cu自旋产生的交错磁场。Cu自旋形成紧密的反铁磁自旋网络，并且在Nd共振期间几乎处于静止状态。交错场作为Nd自旋上的附加各向异性场。AFMR中的各种磁参数与高场磁化研究所确定的磁参数雅阁。

项目成果

N. Kontani, Y. Chiba, K. Sugiyama, Y, Hidaka, M. Date: "Anomalous Electron Spin Resonance in Nd_2CuO_4" J. Phys. Soc. Jpn. 59. 3019-3020 (1990)

N. Kontani、Y. Chiba、K. Sugiyama、Y、Hidaka、M. 日期：“Nd_2CuO_4 中的反常电子自旋共振”J. Phys。

N.Kontani,Y.Chiba,K.Sugiyama,Y,Hidaka,M.Date: "Anomalous Electron Spin Resonance in Nd_2CuOCC4DD" J.Phys.Soc.Jpn.59. 3019-3020 (1990)

N.Kontani，Y.Chiba，K.Sugiyama，Y，Hidaka，M.Date：“Nd_2CuOCC4DD 中的反常电子自旋共振”J.Phys.Soc.Jpn.59。

K.Kindo,Y.Chiba,Y.Hidaka and M.Date:"Antiferromagnetic Resonance in Nd_2CuO_4" J.Phys.Soc.Jpn.

K.Kindo、Y.Chiba、Y.Hidaka 和 M.Date：“Nd_2CuO_4 中的反铁磁共振”J.Phys.Soc.Jpn。

O. Kondo, M. Ono, T. Yosida, N. Kontani, Y. Chiba, K. Sugiyama, A. Yamagishi, M. Hikita, Y. Hidaka and M. Date: "High Field Magnetization of Nd_2CuO_4" J. Magn. & Magn. Mater.91-90. 79 (1990)

O. Kondo、M. Ono、T. Yosida、N. Kontani、Y. Chiba、K. Sugiyama、A. Yamagishi、M. Hikita、Y. Hidaka 和 M. Date：“Nd_2CuO_4 的高场磁化” J. Magn

N.Kontani,Y.Chiba,K.Sugiyama,Y,Hidaka,M.Date: "Anomalous Electron Spin Resonance in Nd_2CuO_4" J.Phys.Soc.Jpn.59. 3019-3020 (1991)

N.Kontani，Y.Chiba，K.Sugiyama，Y，Hidaka，M.Date：“Nd_2CuO_4 中的反常电子自旋共振”J.Phys.Soc.Jpn.59。