Quantum Stoner–Wohlfarth model of two-dimensional single-domain magnets
Quantum Stoner–Wohlfarth model of two-dimensional single-domain magnets
复制标题
DOI：
10.1063/5.0143593
复制
发表时间：
2022-09
影响因子：
3.2
通讯作者：
E. Ibrahim;Shufeng Zhang
中科院分区：
文献类型：
--
作者：
E. Ibrahim;Shufeng Zhang
Stoner-Wohlfarth模型是研究单畴磁体磁滞的经典模型。对于有限温度下的二维(2D)磁体，必须扩展Stoner-Wohlfarth模型以包含本征的强自旋涨落。我们预测了2D和3D磁体之间的几个根本不同的磁滞特性。磁化转换图在传统的斯通纳-沃尔法斯模型中被称为星形图形，变得高度依赖于温度，并且相对于横向和纵向磁场是不对称的。我们的结果为基于2D磁性材料的自旋电子学的应用提供了新的见解。
The Stoner–Wohlfarth model is a classical model for magnetic hysteresis of single-domain magnets. For two-dimensional (2D) magnets at finite temperatures, the Stoner–Wohlfarth model must be extended to include intrinsic strong spin fluctuations. We predict several fundamentally different hysteresis properties between 2D and 3D magnets. The magnetization switching diagram known as the astroid figure in the conventional Stoner–Wohlfarth model becomes highly temperature dependent and asymmetric with respect to the transverse and longitudinal magnetic fields. Our results provide new insights into the spintronics applications based on 2D magnetic materials.