Thermoelectric detection of ferromagnetic resonance of a nanoscale ferromagnet

Details Thermoelectric detection of ferromagnetic resonance of a nanoscale ferromagnet Thermoelectric detection of ferromagnetic resonance of a nanoscale ferromagnet

2011-08-05

arxiv.org/abs/1108.1286v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

We present thermoelectric measurements of the heat dissipated due to ferromagnetic resonance of a Permalloy strip. A microwave magnetic field, produced by an on-chip coplanar strip waveguide, is used to drive the magnetization precession. The generated heat is detected via Seebeck measurements on a thermocouple connected to the ferromagnet. The observed resonance peak shape is in agreement with the Landau-Lifshitz-Gilbert equation and is compared with thermoelectric finite element modeling. Unlike other methods, this technique is not restricted to electrically conductive media and is therefore also applicable to for instance ferromagnetic insulators.

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