Linear birefringence control and magnetization in sputter-deposited magnetic garnet films
Document Type
Article
Publication Date
11-1-2004
Abstract
Birefringence control is essential in the fabrication of on-chip magnetooptic Faraday isolators. We report on film thickness and stress studies of birefringence in sputter-de-posited single-layer bismuth-substituted iron garnet films and double-layer iron garnet films with gadolinium gallium garnet (GGG) covers. We examine compressively and tensilely strained films and analyze the photoelastic response of the sputter-de-posited garnet films. We show that the net birefringence can be nulled out under planar compressive strain conditions. Bilayer GGG on iron garnet film yields a reduced birefringence. Temperature control during the sputter deposition of the GGG cover is critical and strongly influences the magnetic moment and birefringence level in the waveguide. High-temperature deposition lowers the magnetization in the underlying iron garnet film.
Publication Title
IEEE Transactions on Magnetics
Recommended Citation
Yang, H.,
Levy, M.,
Li, R.,
Moran, P.,
Gutierrez, C.,
&
Bandyopadhyay, A.
(2004).
Linear birefringence control and magnetization in sputter-deposited magnetic garnet films.
IEEE Transactions on Magnetics,
40(6), 3533-3537.
http://doi.org/10.1109/TMAG.2004.836739
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/11061