| Project/Area Number |
02640249
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
固体物性
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| Research Institution | Miyagi University of Education |
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Principal Investigator |
CHIBA Yoshiaki Miyagi Unv. of Education. Assoc. Professor, 教育学部, 助教授 (40113881)
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| Co-Investigator(Kenkyū-buntansha) |
DATE Muneyuki Osaka Univ. Faculty of Science. Professor, 理学部, 教授 (80028076)
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| Project Period (FY) |
1990 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1991: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1990: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | 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 |
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| Research Abstract |
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.
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