Coherent radiation by molecular magnetsV. 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.
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