2001/04/30 by L. E. Helseth, R. W. Hansen, E. I. Il’yashenko +3 · 2 citations
Engineering · Physics and Astronomy · #Magneto-Optical Properties and Applications #Photonic and Optical Devices #Photorefractive and Nonlinear Optics #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.64.174406
published as Physical Review B, Volume 64, 174406 (2001) · 15 pages, 6 figures, published in Phys. Rev. B
openalex publication_date 2001/10/02 · arxiv created 2002/01/27 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
Single crystal films of bismuth-substituted ferrite garnets have been synthesized by the liquid phase epitaxy method where gadolinium gallium garnet substrates are dipped into the flux. The growth parameters are controlled to obtain films with in-plane magnetization and virtually no domain activity, which makes them excellently suited for magnetooptic imaging. The Faraday rotation spectra were measured across the visible range of wavelengths. To interpret the spectra we present a simple model based on the existence of two optical transitions of diamagnetic character, one tetrahedral and one octahedral. We find excellent agreement between the model and our experimental results for photon energies between 1.77 and 2.53 eV, corresponding to wavelengths between 700 and 490 nm. It is shown that the Faraday rotation changes significantly with the amount of substituted gallium and bismuth. Furthermore, the experimental results confirm that the magnetooptic response changes linearly with the bismuth substitution.