论文部分内容阅读
以磁化率测量及 Mssbauer 谱分析研究 Ge 含量对γ-Fe-Mn 合金 Néel 转变的影响。在0-8.7at-%范围内,Ge 含量增加,磁化率增大。在 T>T_N 时,合金逐渐由 Pauli 顺磁性态转变为Curie-Weiss 顺磁性态,在 T_N 点处呈现的磁化率尖峰增高,同时 Néel 转变温度(T_N)线性下降。随Ge 含量的增多,超精细场分布 P(H)的极大值朝低场方向移动,平均内场强度下降。这些结果暗示,增加 Ge 含量,促进 Fe 原子处的局域净磁矩增强,并减弱γ-Fe-Mn 合金中3d 电子的巡游特性。
The effect of Ge content on the Néel transformation of γ-Fe-Mn alloy was investigated by magnetic susceptibility and Mssbauer spectral analysis. In the range of 0-8.7at-%, the content of Ge increases and the susceptibility increases. When T> T_N, the alloy gradually changes from Pauli paramagnetic state to Curie-Weiss paramagnetic state, and the magnetic susceptibility peak appears higher at T_N point and the Néel transition temperature (T_N) decreases linearly. With the increase of Ge content, the maximum value of hyperfine field distribution P (H) moves toward the lower field and the average field intensity decreases. These results suggest that increasing the Ge content promotes the enhancement of the local net magnetic moment at the Fe atom and weakens the 3d electron parade in the γ-Fe-Mn alloy.