Excitation modes of vortices in submicron magnetic disks

被引：10
|
作者：
Zarzuela, R. [1 ,2 ]
Chudnovsky, E. M. [2 ]
Tejada, J. [1 ]
机构：
[1] Univ Barcelona, Fac Fis, Dept Fis Fonamental, E-08028 Barcelona, Spain
[2] CUNY Herbert H Lehman Coll, Dept Phys, Bronx, NY 10468 USA
来源：
PHYSICAL REVIEW B | 2013年 / 87卷 / 01期
关键词：
VORTEX; DYNAMICS; MOTION; DOTS;
D O I：
10.1103/PhysRevB.87.014413
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Classical and quantum theory of spin waves in the vortex state of a mesoscopic submicron magnetic disk have been developed with account of the finite mass density of the vortex. Oscillations of the vortex core resemble oscillations of a charged string in a potential well in the presence of the magnetic field. A conventional gyrotropic frequency appears as a gap in the spectrum of spin waves of the vortex. The mass of the vortex has been computed, and the result agrees with experimental findings. The finite vortex mass generates a high-frequency branch of spin waves. The effects of an external magnetic field and dissipation have been addressed. DOI: 10.1103/PhysRevB.87.014413
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页数：11
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