The Curie Temperature of Anisotropic Heisenberg Ferromagnet with Mixed Spins of S=1/2 and S=1

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概要

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• For the anisotropic Heisenberg ferromagnet with mixed spins of S: 1/2 andS=1, the Curie temperature 'T. has been calculated with the use of pair modelapproxirhation. Assuming the anisotropic bilinear and biquadratic exchangeinteractions (J and J') between nearest neighbors of the different spins, and theuniaxial single-ionic anisotropy D for each spin of .5= 1, the behaviors of T. asa function of these exchange parameters and the uniaxial anisotropy parameter areinvestigated for some types of the spin system with various values of the anisotropyparameter cx of the exchange interaction. For small values of the exchange an-isotropy parameter x it has turned out that T. decreases with D in the range of0< Z)<0.5J.. Furthermore, the biquadratic exchange interaction turns out to givelittle effect on the Curie temperature of the anisotropic Heisenberg ferromagnetwith mixed spins when the exchange anisotropy parameters are in the range of0.48$a'l:0.55.

• 社団法人日本物理学会の論文
• 1985-02-15

著者

• ISHIDA Toshimasa

  Osaka University of Pharmaceutical Sciences

• URYU Norikiyo

  Department of Applied Science, Faculty of Engineering, Kyushu University

• Iwashita T

  Suntory Institute For Bioorganic Research

• Iwashita T

  College Of General Education Kyushu Tokai University

• Uryu Norikiyo

  Department Of Applied Science Faculty Of Engineering Kyushu University

• Uryu Norikiyo

  Department Of Applied Science Faculty Of Engineering 36 Kyushu University

• IWASHITA Takashi

  College of General Education,Kyushu Tokai University

• Iwashita Takashi

  College Of General Education Kyushu Tokai University

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