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A Mean-Field Approach To A Discrete Dipolar Spin Model With Uniaxial Magnetic Anisotropy

Author

Listed:
  • YUSUKE TOMITA

    (Institute for Solid State Physics, University of Tokyo, Kashiwa-no-ha 5-1-5, Kashiwa, Chiba 277-8581, Japan)

  • SHUNSUKE YANAI

    (Institute for Solid State Physics, University of Tokyo, Kashiwa-no-ha 5-1-5, Kashiwa, Chiba 277-8581, Japan)

  • HAJIME TAKAYAMA

    (Institute for Solid State Physics, University of Tokyo, Kashiwa-no-ha 5-1-5, Kashiwa, Chiba 277-8581, Japan)

Abstract

Using the mean-field approximation, we study the reorientation transition in a discrete dipolar spin model. We array thed-dimensional spins in thed-1-dimensional hypercubic lattice points, and apply the magnetic anisotropy in thedth 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.

Suggested Citation

  • Yusuke Tomita & Shunsuke Yanai & Hajime Takayama, 2009. "A Mean-Field Approach To A Discrete Dipolar Spin Model With Uniaxial Magnetic Anisotropy," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 20(09), pages 1335-1343.
    • Handle: RePEc:wsi:ijmpcx:v:20:y:2009:i:09:n:s0129183109014400
    DOI: 10.1142/S0129183109014400
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