Annealing effect in terbium-scandium-aluminum garnet single crystal

Yuji Kagamitani, Dorota Anna Pawlak, Hiroki Sato, Akira Yoshikawa, Hiroshi Machida, Tsuguo Fukuda

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

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 languageEnglish
Pages (from-to)6020-6022
Number of pages3
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume41
Issue number10
DOIs
Publication statusPublished - 2002 Oct

Keywords

  • Anneal
  • Garnet
  • Optical isolator
  • Oxidation state
  • TbScAlO
  • Verdet constant

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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