Magnetic vortex dynamics in thickness-modulated Ni80Fe20 disks

被引：26
作者：
Shimon, G. [1 ,2 ]
Adeyeye, A. O. [1 ,2 ]
Ross, C. A. [2 ,3 ]
机构：
[1] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore
[2] Singapore MIT Alliance, Singapore 117576, Singapore
[3] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
来源：
PHYSICAL REVIEW B | 2013年 / 87卷 / 21期
关键词：
REVERSAL; SIZE;
D O I：
10.1103/PhysRevB.87.214422
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The magnetic vortex dynamics in thickness-modulated Ni80Fe20 disks in the form of a Ni80Fe20 lens on top of a Ni80Fe20 disk are investigated. The vortex core location can be systematically controlled via the geometry, and the propagation and annihilation can be detected using ferromagnetic resonance measurements. The thickness modulation provides an additional shape anisotropy, which defines the vortex chirality in the disk depending on the magnetization reversal history and the magnetic interactions between the disk and the lens. The vortex propagation and annihilation in each layer were identified by their resonance modes.
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页数：8
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