Structure and Lattice Deformation of Ce-Substituted Yttrium Iron Garnet Film Prepared by RF Sputtering

We investigated the structure and lattice deformation of CeY2Fe5-δO12-Z (Ce1·YIG) film prepared by RF sputtering. We found that the lattice constant parallel to the film plane a // is equal to the lattice constant of the substrate a s. This shows that this Ce1·YIG film belongs to Region I in the Besser model. Some Ce1·YIG films become a double-layer structure as the lattice constant mismatch || Δa|| increases. This change in the film structure caused by || Δa|| is very different from that of LPE film. In a Faraday rotation θF spectrum of single-layer films deposited on GCGMZG and GGG substrates, the θF dispersion around 800 nm is shifted to the longer wavelength side. We consider this θF shift around 800 nm to be induced by the difference in the film deformation.