Nuclear Spin-Lattice Relaxation Mechanism of Singlet-ground-State Magnet with Exchange Coupling:Application to CsFeCl_3
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概要
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A model is proposed on the exchange coupled singlet-ground-state magnet aroundthe level crossing field. The model starts from the energy level of the isolated singlespin in paramagnetic spin system. The effect of the exchange coupling is taken into ac-count by modifying the single ion level scheme to the broadened continuum band. Onthe basis of this model is discussed a mechanism of the nuclear spin-lattice relaxationinherent in the level crossing, due to the direct process between the nuclear spin andthe exchange coupled electron spin system. A drastic increase of the nuclear spin-Rattice relaxation rate of "'Cs in CsFeCl, observed at 4.2 K around the level crossingfield at 7.5 T is well explained by this model. The magnetization as a function of exter-nal magnetic field is also discussed and compared with the result of CsFeCl, up to 12T.[nuclear spin-lattice relaxation, singlet-ground-state, CsFeC13, level crossing, If direct process, exchange shift, exchange broadeningl
- 社団法人日本物理学会の論文
- 1988-09-15
著者
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AJIRO Yoshitami
Department of Chemistry, Graduate School of Science, Kyoto University
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Chiba M
Fukui Univ. Fukui
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Chiba Meiro
Department Of Applied Physics Fukui University
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Chiba Meiro
Institute Of Atomic Energy Kyoto University
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Morimoto T
Institute Of Atomic Energy Kyoto University
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Morimoto Takeshi
Institute of Atomic Energy, Kyoto University
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ADACHI Kimio
Kobe Tokiwa Junior College
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Adachi Kengo
Department Of Physics Faculty Of Engineering Fukui Institute Of Technology
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Ajiro Yoshitami
Department Of Applied Physics Faculty Of Engineering Fukui University
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Morimoto Takeshi
Institute Of Atomic Energy Kyoto University
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Morimoto T
Graduate School Of Human And Environmental Studies Kyoto University
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Adachi K
Kobe Tokiwa Junior College Department Of Physical Science Graduate School Of Engineering Science Osa
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Adachi Kengo
Department Of Physics Faculty Of Science Nagoya University
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Adachi Kengo
Faculty Of Engineering Nagoya Unibersity
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