受驱动磁性分子中磁化强度的动态开关
Dynamic switching of magnetization in driven magnetic molecules
摘要：
研究了分子磁体在半经典处理下，在静态和可变磁场驱动下的磁化动力学。当能量肯定低于各向异性势垒时，下面的分析在一个区域是有效的，但仍然有大量的状态被激发。我们发现相空间包含一条分界线。远离它的解是振荡的，而分界线解是孤立子型的。分界线附近的国家是非常敏感的小扰动，我们利用动态感应磁化切换的事实。
英文摘要：
We study the magnetization dynamics of a molecular magnet driven by static and variable magnetic fields within a semiclassical treatment. The underling analyzes is valid in a regime, when the energy is definitely lower than the anisotropy barrier, but still a substantial number of states are excited. We find the phase space to contain a separatrix line. Solutions far from it are oscillatory whereas the separatrix solution is of a soliton type. States near the separatrix are extremely sensitive to small perturbations, a fact which we utilize for dynamically induced magnetization switching.
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