A mean-field approach to a discrete dipolar spin model with uniaxial magnetic anisotropy

Yusuke Tomita, Shunsuke Yanai, Hajime Takayama

Research output: Contribution to journalArticle


Using the mean-field approximation, we study the reorientation transition in a discrete dipolar spin model. We array the d-dimensional spins in the d-1-dimensional hypercubic lattice points, and apply the magnetic anisotropy in the dth direction. Even though the long-range dipolar interaction is truncated to the nearest-neighbor interaction, the model exhibits the reorientation transition. The effects of the exchange interaction on the dipolar system are also studied.

Original languageEnglish
Pages (from-to)1335-1343
Number of pages9
JournalInternational Journal of Modern Physics C
Issue number9
Publication statusPublished - 2009 Sep
Externally publishedYes



  • Critical phenom-ena
  • Dipolar lattice
  • Mean-field theory
  • Reorientation transition

ASJC Scopus subject areas

  • Computer Science Applications
  • Computational Theory and Mathematics
  • Physics and Astronomy(all)
  • Statistical and Nonlinear Physics
  • Mathematical Physics

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