应力对铁磁薄膜磁滞损耗和矫顽力的影响

摘要

改进了JA-SW混合模型，使之能处理具有两种单轴各向异性的磁体。数值研究了面内应力对铁磁薄膜磁滞损耗和矫顽力的影响。结果表明，磁滞损耗和矫顽力与应力强度和应力施加方向以及外场取向有关。磁滞损耗或矫顽力随应力强度变化的关系曲线并不完全是单调增加的，比如当外场与易轴方向平行时会出现弯曲。另外，应力会造成矫顽力随外场取向角关系曲线的峰值偏移。结果与文献资料进行了广泛对比并对其差异进行了解释。%The JA-SW hybrid model is extended in order to include the strain or stress anisotropy. With this improved model, a simulation is carried out to study the effects of stress on magnetic hysteresis loss and coercivity of ferromagnetic film. It is shown that the hysteresis loss and coercivity are related to the external field orientation, the stress intensity and the stress direction. Hysteresis loss, or the coercive force does not entirely monotonially increase with the change of stress intensity. For example, when the external field is parallel to the easy axis, a valley appears in the curve. In addition, stress will cause the peak offset of the coercivity curve as the orientation angle of the external field changes. Extensive comparisons of results with literature data are made and the differences between them are explained.