一阶回转曲线(first-order reversal curve 简称FORC)图谱法被视为研究滞后效应领域中的"指纹鉴定",受到了地质学界和物理学界的科学家极大的关注.在磁滞后系统中,FORC图谱可以相当敏感地表征磁性颗粒间的交换作用和矫顽力的分布情况,并且能够对磁化过程中的动态问题如不同的磁场变化速率等情况做出精确的分析.FORC图谱法也可应用到其它有滞后效应的领域如铁电滞后、热滞后、弹性滞后等.文章将从磁性领域入手,通过比较Preisach模型引入FORC图谱法,利用Takacs模型验证FORC图谱的计算过程,并列举出FORC图谱在纳米双相磁性材料的应用.
参考文献
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