Magnetically driven maser effect in the resonant dynamics of V15 molecular nanomagnets

resonant dynamics of magnetic molecules with spin 1/2 ground state, such as v15, is theoretically studied. in our model calculation, crystals of this molecular nanomagnet are probed by time-dependent magnetic fields, which continuously invert populations of spin states. if the sample is placed in a resonant cavity, relaxation of excited states, via spin-photon interaction, allows for stimulated emission of radiation in the microwave range at resonance.