REFLECTION OF MAGNETOACOUSTIC WAVES IN MAGNETIC-MATERIALS IN THE VICINITY OF THE SPIN-FLIP POINT

The reflection of magnetoacoustic waves in an antiferromagnet with 'ea sy plane'' anisotropy in the vicinity of the spin-flip phase transitio n with respect to a magnetic field is investigated. It is shown that t he angle of reflection and mode conversion efficiencies can be effecti vely field-controlled. The magnetoacoustic Schoch effect. which descri bes the spatial displacement of the reflected beam relative to the geo metrically reflected beam and which grows stronger as the spin-flip po int is approached, is investigated for finite beams of transverse magn etoacoustic waves.