无外场条件下磁性薄膜的有限温度phase diagram
Finite temperature phase diagram of ultrathin magnetic films without external fields
摘要：
我们通过引入平均场论来分析非均匀磁性薄膜的有限温度相图，该理论在低各向异性区域有效，即，de Spin Reorientation Transition附近的景点理论结果进行了比较与蒙特卡罗模拟的微观海森堡模型。建立了系统的有限温度行为和基态性质之间的联系。分析了条纹图案的一些性质，如倾斜态的存在、条纹宽度变化现象以及相关的磁化分布。
英文摘要：
We analyze the finite temperature phase diagram of ultrathin magnetic films by introducing a mean field theory, valid in the low anisotropy regime, i.e., close to de Spin Reorientation Transition. The theoretical results are compared with Monte Carlo simulations carried out on a microscopic Heisenberg model. Connections between the finite temperature behavior and the ground state properties of the system are established. Several properties of the stripes pattern, such as the presence of canted states, the stripes width variation phenomenon and the associated magnetization profiles are also analyzed.
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