Magnetization pinning in conducting films demonstrated using broadband ferromagnetic resonance

Details Magnetization pinning in conducting films demonstrated using broadband ferromagnetic resonance Magnetization pinning in conducting films demonstrated using broadband ferromagnetic resonance

2010-06-02

arxiv.org/abs/1006.0331v1

Physics

Condensed Matter

Materials Science

Scientific paper

The broadband microstrip ferromagnetic resonance technique has been applied for detection and characterization of a magnetic inhomogeneity in a film sample. In the case of a 100nm thick Permalloy film an additional magnetically depleted top sub-layer, practically unidentifiable by the conventional ferromagnetic resonance setup, has been detected and characterized. These results have been confirmed by Brillouin light scattering spectroscopy revealing the fact that the optical properties of the additional sub-layer do not differ much from those of the bulk of the film. Subsequent characterization of a large number of other presumably single-layer films with thicknesses in the range 30-100nm using the same ferromagnetic resonance technique also revealed the same effect.

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