Crossover between first- and second-order transitions of a spin tunneling in a magnetic field

被引：14

作者：

Choi, T ^{[1
]}

Kim, GH ^{[1
]}

机构：

[1] Sejong Univ, Dept Phys, Kwangjin Gu, Seoul 143747, South Korea

来源：

PHYSICA B | 2000年 / 291卷 / 3-4期

关键词：

quantum tunneling; nanomagnetic system; crossover temperature;

D O I：

10.1016/S0921-4526(99)02886-0

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Based on the spin-coherent state path integral, we have considered the quasiclassical escape rate transition for the nano-spin system. Expanding the period of the classical motion in the imaginary time around the top of the potential barrier, we have presented the boundary between the first- and the second-order transition, and the corresponding crossover temperature for the uniaxial and the biaxial spin system. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：219 / 224

页数：6

共 22 条

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