Title :
Interactions between magnetostatic and surface acoustic waves in garnet films
Author :
Hanna, S.M. ; Murphy, G.P.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Polytech. Univ., Farmingdale, NY, USA
fDate :
11/1/1988 12:00:00 AM
Abstract :
The interaction between magnetostatic waves (MSWs) and surface acoustic waves (SAWs) propagating in the same epitaxially grown single-crystal yttrium iron garnet (YIG) film is investigated. As the acoustic wave propagates in the magnetic film, magnetoelastic coupling between the elastic strain fields of the SAW and the magnetic spin system takes place, so that the SAW slightly modulates the characteristics of the magnetic medium. A novel approach for spectrum analysis is introduced that is based on the diffraction of a magnetostatic wave by a Bragg cell generated by an acoustic wave. The RF signal to be detected is fed to a single microstrip line to excite the MSW. Thus, the operating frequency of such a device can be as high as 20 GHz or more
Keywords :
garnets; magnetic epitaxial layers; magnetic thin film devices; magnetoacoustic effects; magnetoelastic effects; magnetostatic wave devices; magnetostatic waves; solid-state microwave devices; surface acoustic waves; yttrium compounds; 20 GHz; Bragg cell; RF signal; YFe5O12; YIG; elastic strain fields; epitaxial layer; garnet films; magnetic spin system; magnetoelastic coupling; magnetostatic waves; microstrip line; operating frequency; spectrum analysis; surface acoustic waves; Acoustic propagation; Acoustic waves; Garnets; Iron; Magnetic films; Magnetoelasticity; Magnetostatic waves; Sawing machines; Surface acoustic waves; Yttrium;
Journal_Title :
Magnetics, IEEE Transactions on
