中国物理B ›› 2007, Vol. 16 ›› Issue (12): 3832-3836.doi: 10.1088/1009-1963/16/12/046

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Internal energy and specific heat in a ferromagnetic- antiferromagnetic double layers

姜 伟, 国安邦   

  1. College of Sciences, Shenyang University of Technology, Shenyang 110023, China
  • 出版日期:2007-12-20 发布日期:2007-12-20
  • 基金资助:
    Project supported by the Natural Science Foundation of Liaoning Province (Grant No~20041021), the Scientific Foundation of the Educational Department of Liaoning Province (Grant No 2004C006) and the Postdoctoral Foundation of Shenyang University of Techn

Internal energy and specific heat in a ferromagnetic- antiferromagnetic double layers

Jiang Wei(姜伟)† and Guo An-Bang(国安邦)   

  1. College of Sciences, Shenyang University of Technology, Shenyang 110023, China
  • Online:2007-12-20 Published:2007-12-20
  • Supported by:
    Project supported by the Natural Science Foundation of Liaoning Province (Grant No~20041021), the Scientific Foundation of the Educational Department of Liaoning Province (Grant No 2004C006) and the Postdoctoral Foundation of Shenyang University of Techn

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摘要： The internal energy and specific heat of a Heisenberg ferro- antiferromagnetic double-layer system are studied by using spin-wave theory and the retarded Green function method at low temperatures. Numerical results show that the antiferromagnetic intralayer coupling $J_2 $ has an important influence on internal energy and specific heat for a four-sublattice system with antiferromagnetic (or ferrimagnetic) interlayer couplings.

关键词: spin-wave theory, ferromagnetic-antiferromagnetic double layers, internal energy, \\ \hspace*{1.9cm} specific heat

Abstract: The internal energy and specific heat of a Heisenberg ferro- antiferromagnetic double-layer system are studied by using spin-wave theory and the retarded Green function method at low temperatures. Numerical results show that the antiferromagnetic intralayer coupling $J_2 $ has an important influence on internal energy and specific heat for a four-sublattice system with antiferromagnetic (or ferrimagnetic) interlayer couplings.

Key words: spin-wave theory, ferromagnetic-antiferromagnetic double layers, internal energy, specific heat

中图分类号:  (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))

  • 75.40.Cx
75.10.Jm (Quantized spin models, including quantum spin frustration) 75.30.Ds (Spin waves) 75.30.Et (Exchange and superexchange interactions) 75.50.Ee (Antiferromagnetics) 75.70.Cn (Magnetic properties of interfaces (multilayers, superlattices, heterostructures))