Europhys. Lett.
Volume 70, Number 3, May 2005
Page(s) 306 - 312
Section General
Published online 06 April 2005
Europhys. Lett., 70 (3), pp. 306-312 (2005)
DOI: 10.1209/epl/i2004-10496-6

Coherent radiation by molecular magnets

V. I. Yukalov1, 2 and E. P. Yukalova1, 3

1  Institut für Theoretische Physik, Freie Universität Berlin Arnimallee 14, D-14195 Berlin, Germany
2  Bogolubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research Dubna 141980, Russia
3  Department of Computational Physics, Laboratory of Information Technologies Joint Institute for Nuclear Research - Dubna 141980, Russia

received 13 December 2004; accepted 14 March 2005
published online 6 April 2005

The possibility of coherent radiation by molecular magnets is investigated. It is shown that to realize the coherent radiation, it is necessary to couple the considered sample to a resonant electric circuit. A theory for describing this phenomenon is developed, based on a realistic microscopic Hamiltonian, including the Zeeman terms, single-site anisotropy, and dipole interactions. The role of hyperfine interactions between molecular and nuclear spins is studied. Numerical solutions of the spin evolution equations are presented.

07.57.Hm - Infrared, submillimeter wave, microwave, and radiowave sources.
75.50.Xx - Molecular magnets.
76.20.+q - General theory of resonances and relaxations.

© EDP Sciences 2005