Abstract First-order reversal curve (FORC) diagrams are increasingly used as a material’s magnetic domain state fingerprint. FORC diagrams of noninteracting dispersions of single-domain (SD) particles with uniaxial magnetocrystalline anisotropy (MCA) are well studied. However, a large class of materials possess a cubic MCA, for which the FORC diagram properties of noninteracting SD particle dispersions are less understood. A coherent rotation model was implemented to study the FORC diagram properties of noninteracting ensembles of SD particles with positive and negative MCA constants. The pattern formation mechanism is identified and related to the irreversible events the individual particles undergo. Our results support the utility of FORC diagrams for the identification of noninteracting to weakly-interacting SD particles with cubic MCA.

中文翻译：

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具有立方磁晶各向异性的纳米磁铁的一阶反转曲线 (FORC) 图：数值方法

摘要 一阶反转曲线 (FORC) 图越来越多地用作材料的磁畴状态指纹。对具有单轴磁晶各向异性 (MCA) 的单畴 (SD) 粒子的非相互作用分散的 FORC 图进行了充分研究。然而，一大类材料具有立方 MCA，对此非相互作用 SD 粒子分散体的 FORC 图特性了解较少。实施了相干旋转模型来研究具有正和负 MCA 常数的 SD 粒子的非相互作用系综的 FORC 图特性。模式形成机制被识别并与单个粒子经历的不可逆事件相关。我们的结果支持 FORC 图用于识别具有立方 MCA 的非相互作用到弱相互作用 SD 粒子的效用。