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VOLUME 102 | ISSUE 11 | PAGE 876
Critical parameters of nuclear magnon Bose-Einstein condensation in systems with dynamical frequency shift
The critical conditions for the Bose-Einstein condensation of quasi equilibrium nuclear magnons in the easy-plane antiferromagnets CsMnF3 and MnCO3 are theoretically derived. Both systems possess the dynamical frequency shift, the dependence of the precession frequency on the magnetization deflection angle and one is able to observe the magnetic resonance signals in very non-equilibrium conditions when the frequency of pumping is higher than precession frequency. The frequency difference in this case can be compensated by the increasing of deflection angle.