CONSERVATION OF ANGULAR-MOMENTUM IN THE PROBLEM OF TUNNELING OF THE MAGNETIC-MOMENT

被引:47
作者
CHUDNOVSKY, EM
机构
[1] Department of Physics, City University of New York, Lehman College, New York, NY 10468-1589, Bedford Park Boulevard West
关键词
D O I
10.1103/PhysRevLett.72.3433
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Tunneling of the magnetic moment has some unique features not encountered in other tunneling problems. The conservation of energy and angular momentum prohibits transitions between degenerate magnetic states in a free single-domain magnetic particle. For such transitions to occur, the particle must be firmly coupled with a large solid matrix that absorbs the change in the angular momentum. We show that the contribution of this effect to the tunneling rate is determined by the ratio of the magnetic anisotropy energy to the shear modulus of the matrix. An experiment is suggested that can test this prediction.
引用
收藏
页码:3433 / 3436
页数:4
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