Title :
Electrically controlled acoustic beam deflection
Author :
Addison, R.C. ; Auld, B.A. ; Wilkinson, J.H.
Author_Institution :
Stanford University, Stanford, Calif.
Abstract :
A method is described for deflecting a microwave acoustic beam by controlling the group-velocity deviation in an anisotropic medium. The basic principle is presented in terms of a general wave-vector surface. A detailed treatment is then given for the special case of anisotropy due to the spin-acoustic-wave interaction in magnetic insulators. Experimental beam deflection observations in yttrium iron garnet are discussed. A brief discussion of beam deflection in current-carrying piezoelectric semiconductors is also given. Possible applications of this method of beam deflection are suggested.
Keywords :
Acoustic beams; Anisotropic magnetoresistance; Insulation; Magnetic anisotropy; Magnetic semiconductors; Microwave theory and techniques; Perpendicular magnetic anisotropy; Surface acoustic waves; Surface treatment; Yttrium;
Journal_Title :
Proceedings of the IEEE
DOI :
10.1109/PROC.1967.5378
