Spectral analysis of the precessional switching of the magnetization in an isotropic thin film

Details Spectral analysis of the precessional switching of the magnetization in an isotropic thin film Spectral analysis of the precessional switching of the magnetization in an isotropic thin film

2003-10-07

arxiv.org/abs/cond-mat/0310145v1

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1016/j.ssc.2003.09.021

We study how a magnetic field step triggers the precessional switching of the magnetization in an isotropic thin film . Using a variational approach, we estimate analytically the switching frequency and compare it to the results obtained numerically by direct integration of the equations of motion. We show that the periodic motions of the three magnetization components can be described satisfactorily with truncated Fourier expansions, indicating a relatively high spectral purity of the magnetic response. Our analytical expressions are simple enough to be physically transparent at first sight, in contrast to the results of the more elaborate models that treat also anisotropy.

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