Commensurate and Incommensurate States of a Spin-Peierls System in a Magnetic Field
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概要
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Commensurate and incommensurate states of a I-Ieisenberg spin-Peierls systemin a magnetic field are studied within the mean-field approximation. Free energy,order parameter and magnetization are calculated numerically by taking accountof the effect of all the accompanying harmonics. In particular, it is found that atlow temperatures the field lowers the free energy of the incommensurate statesand results in the commensurate to incommensurate phase transition. The natureof this transition is discussed. It is also found that the incommensurate to normalphase transition temperature behaves anomalously in a strong field. The resultantphase diagram is compared with the experimental data on TTF-CuBDT.
- 社団法人日本物理学会の論文
- 1982-06-15
著者
-
Harada Isao
Department Of Physics Faculty Of Science Kobe University
-
Kotani Akio
Department Of Mechanical Engineering Osaka University
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