| Er_2Fe_(17-x)Si_x(x=0,1,2)合金的分子场理论分析 |
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| 引用本文： | 张向牧.Er_2Fe_(17-x)Si_x(x=0,1,2)合金的分子场理论分析[J].哈尔滨师范大学自然科学学报,2001(4). |
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| 作者姓名： | 张向牧 |
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| 作者单位： | 沧州师范专科学校 |
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| 摘 要： | 用两格点分子场理论分析了合金 Er2 Fe17- x Six( x=0 ,1 ,2 )的饱和磁化强度随温度的变化关系 ,得到了分子场系数 n EE、n EF、n FF,计算了居里温度 ,给出了分子场强度 HEr( T)、HFe( T)随温度变化的曲线 .结果表明 ,当 x增加时 ,分子场系数 n FF明显增大 ,分子场强度 HFe( T)亦随之增大 ,而 HEr( T)在较低温区减小 ,在较高温区增大 ,并且 n FF的增大是居里温度提高的主要原因
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| 关 键 词： | 两格点分子场理论 分子场强度 分子场系数 饱和磁化强度 居里温度 |
MOLECULAR FIELD THEORY ANALYSIS OF Er_2Fe_( 17-x)Si_x(x=0,1,2) ALLOYS |
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| Zhang Xiangmu.MOLECULAR FIELD THEORY ANALYSIS OF Er_2Fe_( 17-x)Si_x(x=0,1,2) ALLOYS[J].Natural Science Journal of Harbin Normal University,2001(4). |
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| Authors: | Zhang Xiangmu |
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| Institution: | Cangzhou Teacher's College |
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| Abstract: | Through the two-sublattice molecular field theory,the temperature dependence of the saturation magnetixation of Er 2Fe 17-xSi x alloys has been analysed.The molecular field coefficients n EE,n EF and n FFare obtained and Curie temperatures of the alloys are calculated.And also the curves of the intensity of molecular field H Er(T) and H Fe(T) are plotted.The results of analysis have showed that with the increment of x,the molccular field coefficient n FF increase obviously and the increment of H Fe(T) follows as well with the decrease of H Er(T) in the range of low temperature and the increase in the range of higher temperature.The increase of n FF is the main cause of the rising of Curie temperature. |
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| Keywords: | Two-sublattice molecular field theory Molecular field intensity Molecular field coefficient Saturation magnetization Curie temperature |
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