Stoner-Wohlfarth铁磁性模型的静态性质
The Stoner-Wohlfarth model of Ferromagnetism: Static properties
摘要：
高密度磁存储和自旋电子学的最新进展是基于磁性材料与常规微电子材料（金属、绝缘体和半导体）的使用。单位信息（比特）作为磁化状态被存储在某些铁磁材料（FM）中，并且利用改变磁化状态的外部场来控制。随着器件尺寸向纳米级稳步缩小，以及对增加其带宽的需求占主导地位，向更高频率的竞争变得更加激烈。在磁性系统中，更密集的存储导致更精细的磁性颗粒，并且小尺寸导致单磁畴物理。Stoner-Wohlfarth模型是最简单的模型，它充分描述了包含单畴的细磁性颗粒的物理特性，其中磁化状态通过旋转或切换（突然反转）而改变。本文对SW模型进行了回顾和讨论，并讨论了它在磁学和自旋电子学中的应用前景。
英文摘要：
Recent advances in high-density magnetic storage and spin electronics are based on the use of magnetic materials along with conventional microelectronic materials (metals, insulators and semiconductors). The unit information (bit) is stored as a magnetization state in some ferromagnetic ma rial (FM) and controlled with an external field altering the magnetization state. As device size is shrinking steadily toward the nanometer and the need to incr se its bandwidth prevails, racing toward higher frequencies is getting even more cha enging. In magnetic systems, denser storage leads to finer magnetic grains and small size leads to single magnetic domain physics. The Stoner-Wohlfarth model is the simplest model that describes adequately the physics of fine magnetic grains containing single domains and where magnetization state changes by rotation or switching (abrupt reversal). The SW model is reviewed and discussed with its consequences and potential app cations in the physics of magnetism and spin electronics.
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