RUI: Micromagnetism of Quantum and Disordered Systems

建立磁性系统中微观量子隧穿的综合理论。该研究将与正在进行的实验相联系，并将包括计算典型磁各向异性形式和典型实验几何形状的隧穿率，小铁磁粒子集合中磁相互作用的影响，存在时间相关磁场的隧穿，磁化强度与微观自由度相互作用的耗散。还有反铁磁体和自旋玻璃中的磁量子隧穿以及有限温度下理论的扩展。此外，学院将继续研究非晶磁体的相关自旋玻璃理论。PI计划将理论扩展到具有多个磁子网络和波动交换相互作用的非晶态系统，考虑密集排列的非晶态铁磁粒子系统，并研究相关自旋玻璃重入相变中的长波自旋激发。

To develop a comprehensive theory of microscopic quantum tunneling in magnetic systems. The study will be linked to ongoing experiments and will include the calculation of tunneling rates for typical forms of magnetic anisotropy and typical geometries of experiment, effect of magnetic interactions in an ensemble of small ferromagnetic particles, tunneling in presence of time dependent magnetic field, dissipation due to the interaction of the magnetization with microscopic degrees of freedom,. Also magnetic quantum tunneling in antiferromagnets and spin glasses and extension of the theory for finite temperature. Also, the PI will continue research on the correlated spin glass theory of amorphous magnet. The PI plans to extend the theory for amorphous systems with several magnetic sub-networks and fluctuating exchange interaction, to consider a system of densely packed amorphous ferromagnetic particles, and to study long wavelength spin excitations in the correlated spin glass - reentrant phase transition.