High-frequency AFMR branch in quasi-one-dimensional CsMnCl3·H2O and associated two-magon excitations
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 SSRA. I. PetutinPhysicotechnical Institute of Low Temperatures, Academy of Sciences of the Ukrainian SSR
ABI
Abstract
A study was made of microwave power absorption in a quasi-one-dimensional antiferromagnetic, CsMnCl3·H2O, at frequencies of 25–130 GHz and T = 1.46°K. Uniform antiferromagnetic resonance associated with excitation of the upper branches was investigated. The absorption spectrum exhibited features due to the low-dimensional magnetic structure of one crystal, viz., two-magnon subthreshold absorption involving magnons from the upper and lower branches of the spin-wave spectrum.
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