Investigation of the giant magneto-impedance effect of single crystalline YIG based on the ferromagnetic resonance effect

Abstract

We investigated the giant magneto-impedance (GMI) effect on ferrimagnetic insulator yttrium iron garnet (YIG) films and spheres, and the ferromagnetic resonance effect played a vital role. The GMI results were derived from the high-frequency measurements of a microwave transmission line loaded with YIG films and spheres. Our findings showed that there were obvious distinctions in the impedance of the transmission line loaded with single crystalline YIG samples depending on the external magnetic field, which indicates the significant GMI effect. The maximum GMI ratio as high as 256% was achieved, corresponding to a magnetic response of 8.8%/Oe. This study reveals that single crystalline YIG films are promising candidates for using as probe element in chip-scale magnetic sensors.