Polarization of the spin-S exchange-interaction model

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

Research output: Contribution to journalArticle

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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 kTc/Jz=(2S-1)/(4S ln2S), where z is the coordination number, and the discontinuity of q at Tc is qc=(2S-1)/2S.

Original languageEnglish
Pages (from-to)8323-8328
Number of pages6
JournalPhysical Review B
Volume46
Issue number13
DOIs
Publication statusPublished - 1992 Jan 1

Fingerprint

Exchange interactions
Phase transitions
Polarization
Ferromagnetism
polarization
coordination number
Ground state
ferromagnetism
Superconducting transition temperature
discontinuity
transition temperature
interactions
ground state
configurations
approximation
Hot Temperature

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Chen, H. H. ; Gou, Shih-Chuan ; Chen, Y. C. / Polarization of the spin-S exchange-interaction model. In: Physical Review B. 1992 ; Vol. 46, No. 13. pp. 8323-8328.
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Polarization of the spin-S exchange-interaction model. / Chen, H. H.; Gou, Shih-Chuan; Chen, Y. C.

In: Physical Review B, Vol. 46, No. 13, 01.01.1992, p. 8323-8328.

Research output: Contribution to journalArticle

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