中文摘要：

spin-1/2 的纵的危险性在一个磁场的低维的海森堡铁磁物质，被格林的功能方法在随机的阶段近似以内学习。静态、动态的纵的危险性在低地、高地的区域被计算。为静态的危险性最大值的位置和高度的幂定律被显示不支持四轮马车理论的预言。

英文摘要：

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.