Polarization of the spin-S exchange-interaction model

H. H. Chen, Shih-Chuan Gou, Y. C. Chen

研究成果: Article同行評審

10 引文 斯高帕斯(Scopus)

摘要

The spin-S exchange interaction model of ferromagnetism is studied by the mean-field approximation. This model has 4S(S+1) order parameters, and has infinitely many ground-state configurations. We define a single polarization parameter to describe the ordering of the system. Thermal variation of the polarization q(T) is determined for various spins. The phase transition is first order (except for S=1/2) with phase transition temperature kTc/Jz=(2S-1)/(4S ln2S), where z is the coordination number, and the discontinuity of q at Tc is qc=(2S-1)/2S.

原文English
頁(從 - 到)8323-8328
頁數6
期刊Physical Review B
46
發行號13
DOIs
出版狀態Published - 1992 一月 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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