Abstract
The magnetic field dependence of ultrasonic attenuation α (B) of slow shear waves in the ZnSe:Cr2+crystal at a number of fixed temperatures fromT=1.4 K to 20 K in magnetic fields of up toB=14 T were investigated. For magnetic fieldsBabove 5 T we found that the attenuation increases with B monotonically, and at a given temperature it is proportional to the magnitude of relaxation attenuation atB=0. We show that the magnetic field dependent attenuation is due to the change in populations of the lowest energy levels of the impurity centers CrZn4Se, produced by the Jahn-Teller effect and split by the spin-orbital interaction and the magnetic field. The calculations carried out without fitting parameters are in good agreement with the experimental data.
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