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Critical analysis of the statistical method for the magnetocrystalline anisotropy constants determination of polycrystalline hard magnetic materials

C. B. CIZMAS1,* , L. BESSAIS2, C. DJEGA-MARIADASSOU2

Affiliation

  1. Department of Physics, Transilvania University of Brasov, B-dul Eroilor 29, Brasov-500036, Romania
  2. ICMPE, UMR7182 CNRS-Université de ParisXII, 2/8 rue Henri Dunant, B.P. 28 F-94320 Thiais, France

Abstract

A computational analysis of the hard direction magnetization isotherms of polycrystalline materials with uniaxial symmetry, taking into account the angular statistical distribution of grain axis, is performed. By means of numerical method calculation the practical limits of the analytical description are established. The method determines by analytical way the magnetocrystalline anisotropy constants K1 and K2 and takes into account the misalignment degree of the grain c axis in magnetically oriented polycrystalline materials. By means of computational simulation the influence of theses parameters on the hard direction magnetization isotherms is analyzed. The results are used to define the magnetocrystalline anisotropy analysis of some R-T12 intermetallic compound..

Keywords

Magnetocrystalline anisotropy, Anisotropy constants, 3d-4f intermetallic compounds.

Submitted at: Oct. 2, 2008
Accepted at: Dec. 10, 2008

Citation

C. B. CIZMAS, L. BESSAIS, C. DJEGA-MARIADASSOU, Critical analysis of the statistical method for the magnetocrystalline anisotropy constants determination of polycrystalline hard magnetic materials, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 12, pp. 3311-3316 (2008)