| 应用MFT分析R_2Fe_(17-x)M_x(R=Pr,Nd;x=0.2;M=Al,Ga)合金的磁性 |
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| 引用本文： | 张向牧,刘力,黄瑞旺.应用MFT分析R_2Fe_(17-x)M_x(R=Pr,Nd;x=0.2;M=Al,Ga)合金的磁性[J].河北师范大学学报(自然科学版),1997(3). |
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| 作者姓名： | 张向牧 刘力 黄瑞旺 |
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| 作者单位： | 河北沧州师范专科学校，河北师范大学物理系 |
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| 摘 要： | 用两亚点阵ＭＦＴ分析了Ｒ２Ｆｅ１７－ｘＭｘ合金的饱和磁化强度与温度的关系。得到了分子场系数ｎＲＲ、ｎＲＦ和ｎＦＦ，计算出了居里温度，给出了分子场ＨＲ（Ｔ）、ＨＦｅ（Ｔ）与温度的关系曲线。计算结果表明，在Ｒ２Ｆｅ１７中用Ａｌ、Ｇａ替代部分Ｆｅ离子后，分子场系数ｎＦＦ明显增大，除Ｐｒ２Ｆｅ１７的ＨＲ（Ｔ）外，分子场强度在很大温度范围内显著增加
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| 关 键 词： | 分子场理论（MFT） R2Fe17－xMx 饱和磁化 居里温度 |
Analysis of the Magnetic Behaviors of R 2Fe 17- x M x (R=Pr,Nd; x =0.2;M=Al,Ga) Alloys by MFT |
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| Zhang Xiangmu,Liu Li,Huang Ruiwang.Analysis of the Magnetic Behaviors of R 2Fe 17- x M x (R=Pr,Nd; x =0.2;M=Al,Ga) Alloys by MFT[J].Journal of Hebei Normal University,1997(3). |
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| Authors: | Zhang Xiangmu Liu Li Huang Ruiwang |
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| Institution: | Zhang Xiangmu 1) Liu Li 1) Huang Ruiwang 2) |
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| Abstract: | The temperatrue dependence of the saturation magnetization of R 2Fe 17- x M x alloys has been analysed by the two-sublattice molecular field theory.The molecular field coefficients n RR , n RF and n FF are obtained.Curie temperatures of the alloys are calculated.The curves of the intensity of molecular field H R( T ) and H Fe ( T ) are also plotted.The results of analysis showed that the coefficient n FF increases after the substitution of Al(or Ga)atoms for Fe in R 2Fe 17 and except H R( T ) of Pr 2Fe 17 the H R( T ) and H Fe ( T )markedly increase in a large temperature range. |
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| Keywords: | molecular field theory (MFT) R 2Fe 17- x M x saturation magnetization Curie temperature |
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