Magnetic force microscopy study of microwave-assisted magnetization reversal in submicron-scale ferromagnetic particles

被引：113

作者：

Nozaki, Y. ^{[1
]}

Ohta, M. ^{[1
]}

Taharazako, S. ^{[1
]}

Tateishi, K. ^{[1
]}

Yoshimura, S. ^{[1
]}

Matsuyama, K. ^{[1
]}

机构：

[1] Kyushu Univ, Dept Elect, Fukuoka 8190395, Japan

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 08期

关键词：

D O I：

10.1063/1.2775047

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Changes in magnetic-domain configurations caused by the application of radio-frequency (rf) fields ranging from 3 to 18 GHz were observed using magnetic force microscope. rf fields barely altered the magnetization of Co particles with scattered large crystalline anisotropy; however, for NiFe particles, magnetization switching occurred when the rf approached the natural ferromagnetic-resonance frequency of 5.92 GHz. However, the reduction of the switching field fluctuated widely among the particles. Scattering of the effective energy barrier to thermal fluctuations caused by an applied rf field can explain the stochastic switching properties.

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页数：3

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