Kapitza pendulum effect in a weakly disordered amorphous magnet

Details Kapitza pendulum effect in a weakly disordered amorphous magnet Kapitza pendulum effect in a weakly disordered amorphous magnet

2007-02-25

arxiv.org/abs/cond-mat/0702579v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, Russian version will be submitted to JETP Letters

Scientific paper

Effect of the "random anisotropy" type disorder on orientation of the magnetization in an amorphous magnet is considered. It is shown, that the principal corrections to the free energy of the magnet originate from the fluctuations of the order parameter in the direction of its degeneracy. The types of disorder are found, which lift the continuous degeneracy and suppress the Larkin-Imry-Ma mechanism of disruption of the long-range order in continuously degenerate systems.

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