Spin parity effect on magnetic relaxation by quantum tunneling in nanomagnets

被引：0
|
作者：
Zhang Shu-Qun [1 ]
Chen Zhi-De [2 ]
机构：
[1] Jinan Univ, Dept Optoelect Engn, Guangzhou 510632, Peoples R China
[2] Jinan Univ, Dept Phys, Guangzhou 510632, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2008年 / 50卷 / 01期
关键词：
single molecule magnet; spin parity effect; quantum tunneling;
D O I：
暂无
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Spin parity effect on magnetic relaxation by quantum tunneling in the biaxial spin model is studied by taking into account the transverse local stray field. It is shown that the square root time dependence in the even resonance occurs in the presence of a distribution of transverse anisotropic parameters, while the odd resonance always shows exponential relaxation. Magnetic relaxation under a sweeping field is also studied. The variation of the relaxation curve with the increasing distribution width of the local stray field for even resonance is qualitatively different from that of the odd resonance. The theoretical result on even resonance is in agreement with experimental results on Fe-8 system, while the prediction for odd resonance awaits the experimental verification.
引用
收藏
页码：248 / 252
页数：5
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