Stimulation of the weak ferromagnetic moment in an antiferromagnet by nonresonant magnetic and sound pumping
V. P. SeminozhenkoPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Donetsk and Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kovV. L. SobolevPhysicotechnical Institute, Academy of Sciences of the Ukrainian SSR, Donetsk and Physicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR, Khar’kov
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The effect of a nonresonant alternating magnetic field on the magnitude of the weak ferromagnetic moment of an antiferromagnet is investigated theoretically. It is shown that nonresonant parallel pumping leads to the stimulation of the weak moment. The analogous effect of increasing the weak moment in a nonequilibrium state relative to its equilibrium value at a given temperature is also possible by nonresonant sound pumping. Numerical estimates are presented for MnCO3 and α-Fe2O3.
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