The magnetic properties of the two-dimensional square lattice mixed-spin anisotropic Heisenberg ferromagnet with a transverse magnetic field |
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Authors: | Ai-Yuan Hu Yuan ChenQin Wang |
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Affiliation: | a Department of Physics, Shanghai Jiao Tong University, 200240 Shanghai, PR China b Department of Physics, Guangzhou University, 510006 Guangzhou, PR China |
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Abstract: | The two-dimensional square lattice mixed-spin anisotropic Heisenberg ferromagnet with a transverse magnetic field is studied by means of the double-time Green's function. The analytic expressions of the critical temperature, the high-temperature zero-field susceptibilities, the spin-wave velocity, spin-wave stiffness and spin-wave gap are obtained. The phase diagrams in which the critical temperature, the reorientation temperature and the reorientation magnetic field are shown as a function of single-ion anisotropic parameter are discussed. |
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Keywords: | Quantized spin model Quantum phase transition Single-ion anisotropy Heisenberg ferromagnet |
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