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.
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页数：5
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