Magneto-elastic waves in crystals of magnetic molecules

Details Magneto-elastic waves in crystals of magnetic molecules Magneto-elastic waves in crystals of magnetic molecules

2007-05-02

arxiv.org/abs/0705.0371v1

Physics

Condensed Matter

Statistical Mechanics

8 PR pages, 3 figures

Scientific paper

10.1103/PhysRevB.76.094419

We study magneto-elastic effects in crystals of magnetic molecules. Coupled equations of motion for spins and sound are derived and the possibility of strong resonant magneto-acoustic coupling is demonstrated. Dispersion laws for interacting linear sound and spin excitations are obtained for bulk and surface acoustic waves. We show that ultrasound can generate inverse population of spin levels. Alternatively, the decay of the inverse population of spin levels can generate ultrasound. Possibility of solitary waves of the magnetization accompanied by the elastic twists is demonstrated.

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