Magnetization plateaus of a ferrimagnetic nanoparticle in the presence of single-ion anisotropies |
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Authors: | Wei Jiang Li-mei LiuXiao-xi Li Qi DengHong-yu Guan Fan ZhangAn-bang Guo |
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Institution: | School of Science, Shenyang University of Technology, Shenyang 110870, China |
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Abstract: | The magnetization of a ferrimagnetic mixed-spin nanoparticle for a series of different single-ion anisotropies D1 and D2 with increasing external magnetic field is studied by the use of the effective-field theory with correlations. At low temperature, the magnetization exhibits an obvious step effect for different anisotropies, exchange couplings, and external magnetic field. The results show that the positive single-ion anisotropy D1 (or D2) is a necessary element for the emergence of the accessional magnetization plateaus for the ferrimagnetic mixed-spin nanoparticle. However, for the stronger D2 the magnetization plateaus dissatisfy the 2S+1 criterion in such a ferrimagnetic nanoparticle system. |
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Keywords: | Hexagonal nanoparticle Magnetization plateaus Effective-field theory with differential operator |
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