中国物理B ›› 2014, Vol. 23 ›› Issue (5): 57501-057501.doi: 10.1088/1674-1056/23/5/057501

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Monte Carlo study of the magnetic properties of spin liquid compound NiGa2S4

张开成a, 李永峰b c, 刘永d, 迟锋e   

  1. a College of Mathematics and Physics, Bohai University, Jinzhou 121013, China;
    b Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia Universityof Science and Technology, Baotou 014010, China;
    c School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;
    d State Key Laboratory of Metastable Materials Science & Technology and College of Science, Yanshan University, Qinhuangdao 066004, China;
    e College of Engineering, Bohai University, Jinzhou 121013, China
  • 收稿日期:2013-07-26 修回日期:2013-10-30 出版日期:2014-05-15 发布日期:2014-05-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11247428, 11247210, 10974228, and 61274101) and the Natural Science Foundation of Liaoning Province, China (Grant No. 20121078), and the Education Office of Liaoning Province, China (Grant No. L201197).

Monte Carlo study of the magnetic properties of spin liquid compound NiGa2S4

Zhang Kai-Cheng (张开成)a, Li Yong-Feng (李永峰)b c, Liu Yong (刘永)d, Chi Feng (迟锋)e   

  1. a College of Mathematics and Physics, Bohai University, Jinzhou 121013, China;
    b Key Laboratory of Integrated Exploitation of Bayan Obo Multi-Metal Resources, Inner Mongolia Universityof Science and Technology, Baotou 014010, China;
    c School of Mathematics, Physics and Biological Engineering, Inner Mongolia University of Science and Technology, Baotou 014010, China;
    d State Key Laboratory of Metastable Materials Science & Technology and College of Science, Yanshan University, Qinhuangdao 066004, China;
    e College of Engineering, Bohai University, Jinzhou 121013, China
  • Received:2013-07-26 Revised:2013-10-30 Online:2014-05-15 Published:2014-05-15
  • Contact: Zhang Kai-Cheng E-mail:kczhang@yeah.net
  • About author:75.10.Hk; 75.40.Cx; 75.50.Ee
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11247428, 11247210, 10974228, and 61274101) and the Natural Science Foundation of Liaoning Province, China (Grant No. 20121078), and the Education Office of Liaoning Province, China (Grant No. L201197).

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摘要： The magnetic properties of two-dimensional antiferromagnet NiGa2S4 have attracted much attention and yet some problems are far from being solved. We investigate the magnetic properties of NiGa2S4 by Monte Carlo simulations. A new spin-interacting model is proposed to describe the system, and the specific heat together with the doping effect of nonmagnetic impurity is studied by simulations. The double peaks of the specific heat as well as other behaviors are well reproduced. We also compare our results with those of other models, and the underlying physics is discussed.

关键词: spin liquid state, specific heat, magnetization, correlation length

Abstract: The magnetic properties of two-dimensional antiferromagnet NiGa2S4 have attracted much attention and yet some problems are far from being solved. We investigate the magnetic properties of NiGa2S4 by Monte Carlo simulations. A new spin-interacting model is proposed to describe the system, and the specific heat together with the doping effect of nonmagnetic impurity is studied by simulations. The double peaks of the specific heat as well as other behaviors are well reproduced. We also compare our results with those of other models, and the underlying physics is discussed.

Key words: spin liquid state, specific heat, magnetization, correlation length

中图分类号:  (Classical spin models)

  • 75.10.Hk
75.40.Cx (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.)) 75.50.Ee (Antiferromagnetics)