Europhys. Lett.
Volume 70, Number 4, May 2005
Page(s) 527 - 533
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 15 April 2005
Europhys. Lett., 70 (4), pp. 527-533 (2005)
DOI: 10.1209/epl/i2004-10512-y

Parametric interaction of two acoustic waves in a crystal of molecular magnets

I. D. Tokman1, G. A. Vugalter2 and A. I. Grebeneva2

1  Institute for Physics of Microstructures, Russian Academy of Sciences Nizhny Novgorod 603950, GSP-105, Russia
2  Department of Physics, Nizhny Novgorod State University 23 Gagarin Avenue, Nizhny Novgorod 603950, Russia

received 2 November 2004; accepted 30 March 2005
published online 15 April 2005

The parametric interaction of two weak acoustic waves in a crystal of molecular magnets in the presence of a strong ac magnetic field has been studied theoretically. The frequencies of the ac magnetic field and the acoustic waves are equal and close to the transition frequency of the fundamental doublet. Equations for the amplitudes of the two coupled acoustic waves have been derived. We have shown that one acoustic wave input into the crystal can efficiently excite the other acoustic wave contrariwise propagating.

75.45.+j - Macroscopic quantum phenomena in magnetic systems.
75.50.Xx - Molecular magnets.
43.35.+d - Ultrasonics, quantum acoustics, and physical effects of sound.

© EDP Sciences 2005