Abstract
The photoinduced effect of this study is presented as the decrease ΔHp of ferromagnetic resonance field of surface spin wave modes in an ion-implanted layer of YIG films during light irradiation. The H2+ or He+-implanted films are annealed in a hydrogen atmosphere. The results with annealing show various behaviors of ΔHp caused by implanted and diffused hydrogen, and the formation of large anisotropy in the surface layer of He+ -implanted films. Proposed models on the changes of chemical reaction between hydrogen and ferrous ion and the origin of the large anisotropy are discussed.
