Abstract
This paper describes the ultrasonic behaviour of an yttrium iron garnet (YIG) crystal as function of pressure and magnetic field at room temperature, and reveals that there is magnetic-acoustic interaction in YIG. Similar ultrasonic behaviour under pressure has been revealed by measurements of sound velocity and attenuation of yttrium aluminium garnet (YAG) and YIG. Obviously, this could be attributed to the same garnet crystal structure. However, the ultrasonic behaviour of ferrimagnetic YIG and non-magnetic YAG is different when an external magnetic field is applied.
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