Broadband spin dynamics of Permalloy rings in the circulation state

被引：18
|
作者：
Zhu, XB [1 ]
Malac, M
Liu, ZG
Qian, H
Metlushko, V
Freeman, MR
机构：
[1] Univ Alberta, Dept Phys, Avadh Bhatia Phys Lab, Edmonton, AB T6G 2J1, Canada
[2] Univ Illinois, Dept Elect & Comp Engn, Chicago, IL USA
[3] Univ Alberta, Dept Phys, Edmonton, AB T6G 2J1, Canada
来源：
APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 26期
关键词：
D O I：
10.1063/1.1957107
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The spin dynamics of the remanent state of circulating magnetization in micrometer-scale Permalloy rings is studied by broadband ferromagnetic resonance. A number of resonance modes are observed, depending upon the geometries of coupling the transient excitation to the ring and of magneto-optically monitoring the response. The two dominant modes involve precession with uniform phase around the ring, or in a circularly antisymmetric standing wave pattern with two nodes. Other magnetic normal modes are also excited but with much smaller amplitude.
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页码：1 / 3
页数：3
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