Dipolar-controlled spin tunneling and relaxation in molecular magnets

被引：4
|
作者：
Garanin, D. A. [1 ]
机构：
[1] CUNY, Lehman Coll, Dept Phys & Astron, Bronx, NY 10468 USA
来源：
EUROPEAN PHYSICAL JOURNAL B | 2012年 / 85卷 / 03期
关键词：
QUANTUM RELAXATION; IRON CLUSTER; MONTE-CARLO; MAGNETIZATION; NANOMAGNETS; SYSTEM;
D O I：
10.1140/epjb/e2012-20835-6
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Spin tunneling in molecular magnets controlled by dipole-dipole interactions (DDI) in the disordered state has been considered numerically on the basis of the microscopic model using the quantum mean-field approximation. In the actual case of a strong DDI, coherence of spin tunneling is completely lost and there is a slow relaxation of magnetization, described by t(3/4) at short times. Fast precessing nuclear spins, included in the model microscopically, only moderately speed up the relaxation.
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页数：10
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