Array anisotropy in structured thin film arrays: Influence on the magnetodynamics
Array anisotropy in structured thin film arrays: Influence on the magnetodynamics
Wolf, M.; Patschureck, C.; Schafer, R.; Monch, I.; Schultz, L.; McCord, J.
The dynamic magnetic properties of soft-ferromagnetic thin film element arrays are strongly influenced by long range interelement magnetostatic interaction. In order to estimate the effective array dipolar field a quantitative model is presented, which is based on the superposition of stray fields that arise from the neighborhood of a reference element. Kittel's equation, that describes the magnetodynamics, is generalized for magnetically saturated arrays by additional array dipolar field terms. Measurements of the magnetodynamic response of quasi-saturated arrays with a rectangular base agree with theoretical predictions. Thus, our model allows the estimation of the frequency of the uniform precessional mode in mesoscopic thin film arrays with non-negligible magnetostatic interaction.
Keywords: magnetization dynamics
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Journal of Magnetism and Magnetic Materials 323(2011), 1703-1707
DOI: 10.1016/j.jmmm.2010.12.048
ISSN: 0304-8853
Cited 6 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-15604