Hydrogen annealing effects on the optical absorption loss and lattice constant of Ca-doped YIG and BiGdAlGaIG films.
Open Access
- 1 January 1987
- journal article
- Published by The Magnetics Society of Japan in Journal of the Magnetics Society of Japan
- Vol. 11 (2) , 153-156
- https://doi.org/10.3379/jmsjmag.11.153
Abstract
Annealing effects in H2-atmosphere on the optical absorption loss and lattice constant are studied for Ca- and Si-doped YIG and Ca-doped (BiGd)3(FeAlGa)5O12 films grown by LPE technique. H2-annealing was done at 150∼500°C for 22 hrs. The absorption loss and lattice constant in YIG films with poor impurities or doped Si did not change by H2-annealing at 150 ∼450°C, however, those in Ca-doped YIG and Bi-substituted garnet films changed notably. The changes of the absorption loss are explained by the reduction of Fe ions. The minimum value of the absorption loss was about 250 dB/cm at λ = 0.8μm for both Ca-doped and Ca-free garnet films. These results show that H2-annealing is effective to get iron garnet films with a high figure of merit. The lattice constant increased with increase of annealing temperature, and only in Ca-doped YIG films it decreased drastically at 450°C.Keywords
This publication has 6 references indexed in Scilit:
- Hindering of hydrogen diffusion in stoichiometric yttrium iron garnetJournal of Applied Physics, 1986
- Reducing treatment effects on the optical absorption loss of Ca-doped Bi-substituted iron garnet films.Journal of the Magnetics Society of Japan, 1986
- Reduction of optical absorption in Bi substituted garnet film by annealing.Journal of the Magnetics Society of Japan, 1986
- Pb valence in iron garnetsJournal of Applied Physics, 1977
- Strain induced effects in the LPE growth of garnetsJournal of Crystal Growth, 1975
- Optical Transparency of Rare-Earth Iron GarnetsJournal of Applied Physics, 1966