铁磁性的量子理论

本文用双时格林函数方法计算了铁磁性金属在整个温度范围内的自发磁化强度和磁各向异性常数K₁。计算中考虑了平均每个原子的d电子数非整数的事实和同一原子内d电子之间的交换作用。所得结果较普通Heisenberg模型的有所改进。K₁随温度的变化性质可以得到定性的解释。

THE QUANTUM THEORY OF FERROMAGNETISM

By taking account of the non-integer number of d electrons per atom and the intra- atomic interactions of electrons, a quantum theory of ferromagnetism is given. The spontaneous magnetization and the magnetic anisotropic constant K₁ in the whole temperature range are calculated by using the method of double-time Green's functions in statistical mechanics. The results obtained are better than that of the simple Heisenberg's model. The properties of the temperature dependence of K₁ may be explained qualitatively.