摘要
Longitudinal susceptibifity of the spin-1/2 low-dimensional Heisenberg ferromagnet in a magnetic field, is studied by the Green＇s function method within the random phase approximation. The static and dynamic longitudinal susceptibilities are calculated in the low- and high-field regions. Power laws for the position and height of the static susceptibility maximum are shown not to support the predictions of Landau theory.
基金
The project supported by National Natural Science Foundation of China under Grant No.10674033
the Natural Science Foundation of Guangdong Province under Grant No.04009519
