| 外磁场下单离子各向异性海森堡铁磁体的低温磁性质 |
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| 引用本文： | 吴悠,陈渊. 外磁场下单离子各向异性海森堡铁磁体的低温磁性质[J]. 广州大学学报(自然科学版), 2011, 10(3): 18-26 |
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| 作者姓名： | 吴悠 陈渊 |
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| 作者单位： | 广州大学物理与电子工程学院,广东广州,510006 |
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| 摘 要： | 文章运用自旋波理论研究了在外磁场下有单离子各向异性的一维海森堡铁磁体的低温磁性质,通过霍斯坦因-普利马科夫变换得到近似的哈密顿量,详细讨论了磁化强度、磁化率、内能、比热等随温度、各向异性参数和外磁场的变化情况,推导出内能U(T)和比热Cm(T)随温度的变化规律U(T)～Tα与Cm(T)～Tβ,并得出指数α,β口与单离子...
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| 关 键 词： | 自旋波理论 海森堡模型 单离子各向异性 |
The low-temperature magnetic properties of the Heisenberg ferromagnet with single-ion anisotropy under an external magnetic field |
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| WU You,CHEN Yuan. The low-temperature magnetic properties of the Heisenberg ferromagnet with single-ion anisotropy under an external magnetic field[J]. Journal og Guangzhou University:Natural Science Edition, 2011, 10(3): 18-26 |
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| Authors: | WU You CHEN Yuan |
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| Affiliation: | WU You,CHEN Yuan(School of Physics and Electronic Engineering,Guangzhou University,Guangzhou 510006,China) |
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| Abstract: | The low-temperature magnetic properties of one-dimensional Heisenberg ferromagnets with single-ion anisotropy in a magnetic field are investigated via the spin wave theory.In this paper,we get the approximate Hamiltonian by means of Holstein-Primakoff transformation.The magnetization,susceptibility,internal energy and specific heat as function of temperature,the anisotropy as well as the applied field are discussed in detail.The internal energy U(T) and specific heat Cm(T) are found to have the power-law be... |
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| Keywords: | spin-wave theory Heisenberg ferromagnet uniaxial single-ion anisotropy |
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