Mechanism of "hard" excitation of spin waves in antiferromagnets
Lutovinov V.S., Savchenko M.S.
It is shown that relativistic exchange-enhanced magnon-phonon interaction can lead to hard excitation of spin waves in antiferromagnets. The obtained jump Δ h = hcl-hc2 of the threshold field agrees, in order of magnitude and in its dependence on the temperature and on the magnetic field, with the experimental data N -4
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