Magnetic friction of a nanometer-sized tip scanning a magnetic surface: Dynamics of a classical spin system with direct exchange and dipolar interactions between the spins

被引：28

作者：

Fusco, C. ^{[1
,2
]}

Wolf, D. E. ^{[1
,2
]}

Nowak, U. ^{[3
]}

机构：

[1] Univ Duisburg Essen, Dept Phys, D-47048 Duisburg, Germany

[2] Univ Duisburg Essen, CeNIDE, D-47048 Duisburg, Germany

[3] Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.77.174426

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We theoretically study the occurrence of magnetic friction of a nanometer-sized tip scanning a magnetic surface by studying the dynamics of a model of classical spins interacting through dipolar and exchange interactions, neglecting thermal effects. We find that for small scanning velocities, the friction force linearly scales with the velocity, with a slope proportional to the phenomenological damping parameter of the Landau-Lifshitz-Gilbert equation. At higher velocities, the friction vs velocity relationship becomes rather complex with the presence of a maximum that is explained by the excitations of spin-wave resonances in the sample.

引用

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