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 | Zendy

Claudio Fusco | Zendy; Dietrich E. Wolf | Zendy; U. Nowak | Zendy

Open Access

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

Author(s) -

Claudio Fusco,

Dietrich E. Wolf,

U. Nowak

Publication year - 2008

Publication title -

physical review b

Language(s) - English

Resource type - Journals

eISSN - 1538-4489

pISSN - 1098-0121

DOI - 10.1103/physrevb.77.174426

Subject(s) - condensed matter physics , spins , physics , dipole , phenomenological model , spin (aerodynamics) , dynamics (music) , quantum mechanics , thermodynamics , acoustics

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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