Direct measurement of nonlinear ferromagnetic damping via the intrinsic foldover effect

被引：62

作者：

Gui, Y. S. ^{[1
]}

Wirthmann, A. ^{[1
]}

Mecking, N. ^{[1
]}

Hu, C. -M. ^{[1
]}

机构：

[1] Univ Manitoba, Dept Phys & Astron, Winnipeg, MB R3T 2N2, Canada

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

damping; ferromagnetic resonance; magnetisation; magnetomechanical effects; spin dynamics; DOMAIN-WALL MOTION; MICROWAVE; DRIVEN;

D O I：

10.1103/PhysRevB.80.060402

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An approach to measure precisely nonlinear ferromagnetic damping is demonstrated by using spin dynamos in combination with sensitive electrical probing techniques. The directly measured intrinsic foldover effect unravels a 50-year-old mystery of ferromagnetic metals. Pivotal importance of nonlinear ferromagnetic damping is uncovered via its distinct dependence on the frequency, amplitude, and initial conditions. The experimental results are in excellent agreement with a nonlinear oscillator model, which revises the pioneer work of Anderson and Suhl for nonlinear magnetization dynamics.

引用

页数：4

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