Abstract
Terbium-scandium-aluminum garnet (TSAG) single crystal grown by the Czochralski method was annealed in a reducing or an oxidizing atmosphere. The oxidation state of terbium cations was studied using transmission spectra and magnetic susceptibility. By annealing in the reducing atmosphere. Tb4+ was reduced to Tb3+. In the case of annealing in the oxidizing atmosphere, some of Tb3+ ions were oxidized to Tb4+. Verdet constant and extinction ratios were measured after annealing in both atmospheres. The highest Verdet constant was obtained for the TSAG annealed in the reducing atmosphere (for λ = 649.1 nm V = 8.580 × 10-3 deg;·Oe-1·cm-1). The extinction ratio of the sample annealed in the oxidizing atmosphere showed the highest value of 40.35 dB.
Original language | English |
---|---|
Pages (from-to) | 6020-6022 |
Number of pages | 3 |
Journal | Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers |
Volume | 41 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2002 Oct |
Keywords
- Anneal
- Garnet
- Optical isolator
- Oxidation state
- TbScAlO
- Verdet constant
ASJC Scopus subject areas
- Engineering(all)
- Physics and Astronomy(all)