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Chin. Phys. B, 2018, Vol. 27(12): 127501    DOI: 10.1088/1674-1056/27/12/127501

Dyson-Maleev theory of an X X Z ferrimagnetic spin chain with single-ion anisotropy

Yu-Ge Chen(陈宇戈)1, Yin-Xiang Li(李殷翔)2, Li-Jun Tian(田立君)1, Bin Chen(陈斌)2
1 College of Sciences, Shanghai University, Shanghai 200444, China;
2 Tin Ka-Ping College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China

We use the mean-field approximation of Dyson-Maleev representation to study an XXZ Heisenberg ferrimagnetic spin chain with single-ion anisotropy. By solving the self-consistent equations with different anisotropies, λ and D respectively, the energy spectrums, internal energy, static susceptibility and specific heat are calculated. Especially, the quantum phase transition of the magnetization plateau induced by single-ion anisotropy D is obtained in the model of the ferrimagnetic spin chain by using Dyson-Maleev mean-field theory.

Keywords:  Dyson-Maleev mean-field theory      XXZ anisotropy      Single-ion anisotropy      ferrimagnetic spin chain     
Received:  28 April 2018      Published:  05 December 2018
PACS:  75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))  
  75.50.Gg (Ferrimagnetics)  

Project supported by the National Natural Science Foundation of China (Grant No. 10774035) and the Qianjiang RenCai Program of Zhejiang Province, China (Grant No. 2007R0010).

Corresponding Authors:  Yin-Xiang Li, Bin Chen     E-mail:;

Cite this article: 

Yu-Ge Chen(陈宇戈), Yin-Xiang Li(李殷翔), Li-Jun Tian(田立君), Bin Chen(陈斌) Dyson-Maleev theory of an X X Z ferrimagnetic spin chain with single-ion anisotropy 2018 Chin. Phys. B 27 127501

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