Two-magnon absorption in a low-dimensionality antiferromagnet
A. G. AndersPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRA. I. ZvyaginPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRYu. V. PereverzevPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRA. I. PetutinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSRA. A. StepanovPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
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The antiferromagnetic resonance spectrum of the quasi-one-dimensional antiferromagnet CsMnCl3⋅2H2O in magnetic fields above the reversal field shows an additional absorption band of asymmetric shape whose intensity grows with increasing temperature and falls with increasing frequency. A mechanism for the appearance of the band is proposed, involving the excitation of threshold two-magnon absorption. It is shown that the intensity of such absorption is substantially greater in a low-dimensional magnet than in a three-dimensional one.
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