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    National Tsing Hua University Institutional Repository > 歷任校長 > 陳信雄 (1997-1998) > 期刊論文 >  Polarization of the Spin-S Exchange Interaction Model


    Please use this identifier to cite or link to this item: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80746


    Title: Polarization of the Spin-S Exchange Interaction Model
    Authors: H.H. Chen;S.C. Gou;Y.C. Chen
    教師: 陳信雄
    Date: 1992
    Publisher: American Physical Society
    Relation: PHYSICAL REVIEW B, American Physical Society, Volume 46, Issue 13, OCT 1 1992, Pages 8323-8328
    Keywords: FERROMAGNETISM
    Abstract: 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 kT(c)/Jz = (2S - 1)/(4S ln2S), where z is the coordination number, and the discontinuity of q at T(c) is q(c) = (2S - 1)/2S.
    Relation Link: http://www.aps.org/
    URI: http://nthur.lib.nthu.edu.tw/dspace/handle/987654321/80746
    Appears in Collections:[陳信雄 (1997-1998)] 期刊論文
    [物理系] 期刊論文

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