MFT对R－T化合物R_2Fe_（17）Mx（R=Pr，Nd;Mx=0，N_3或D_（4．8））的磁性分析

MFT ANALYSIS OF MAGNETIC PROPERTIS OF R 2Fe 17 Mx (R=Pr,Nd;Mx=0,N 3 or D 4.8 )COMPOUNDS

】用二亚点阵ＭＦＴ分析Ｒ２Ｆｅ１７Ｍｘ的饱和磁化与温度的关系。得到了分子场系数ｎＲＲ、ｎＲＦ和ｎＦＦ，计算出了居里温度，给出了交换场ＨＲ（Ｔ）、ＨＦｅ（Ｔ）与温度的关系曲线。结果表明，在Ｒ２Ｆｅ１７中渗入Ｎ或Ｄ后，Ｍ２Ｆｅ（０）和ｎＦＦ明显增大，交换场也相应增大，居里温度主要取决于Ｍ２Ｆｅ（０）和ｎＦＦ。

The temperature dependence of the saturation magnetization of R 2Fe 17 Mx compounds have been analysed by using the two sublattice molecular field theory.The molecular field coefficients n RR ,n RF and n FF are obtained.Curie temperature of the compounds are calculated.The curves of H R(T) and H Fe (T) are plotted.The results of the analysis showed that increase of M 2 Fe (0) and n FF after N(or D)atoms permeated into the compounds,H R(T) and H Fe (T)marked increase for each compound in a large temperature range.The n FF M 2 Fe (0)/T C is approximately a constant.