Annealing effect in terbium-scandium-aluminum garnet single crystal

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

doi:10.1143/jjap.41.6020

Annealing effect in terbium-scandium-aluminum garnet single crystal

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

Materials Design Division

Research output: Contribution to journal › Article › peer-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 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	https://doi.org/10.1143/jjap.41.6020
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)

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10.1143/jjap.41.6020

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Annealing effect in terbium-scandium-aluminum garnet single crystal. / Kagamitani, Yuji; Pawlak, Dorota Anna; Sato, Hiroki ; Yoshikawa, Akira; Machida, Hiroshi; Fukuda, Tsuguo.

In: Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers, Vol. 41, No. 10, 10.2002, p. 6020-6022.

Research output: Contribution to journal › Article › peer-review

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title = "Annealing effect in terbium-scandium-aluminum garnet single crystal",

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.",

keywords = "Anneal, Garnet, Optical isolator, Oxidation state, TbScAlO, Verdet constant",

author = "Yuji Kagamitani and Pawlak, {Dorota Anna} and Hiroki Sato and Akira Yoshikawa and Hiroshi Machida and Tsuguo Fukuda",

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T1 - Annealing effect in terbium-scandium-aluminum garnet single crystal

AU - Kagamitani, Yuji

AU - Pawlak, Dorota Anna

AU - Sato, Hiroki

AU - Yoshikawa, Akira

AU - Machida, Hiroshi

AU - Fukuda, Tsuguo

PY - 2002/10

Y1 - 2002/10

N2 - 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.

AB - 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.

KW - Anneal

KW - Garnet

KW - Optical isolator

KW - Oxidation state

KW - TbScAlO

KW - Verdet constant

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Annealing effect in terbium-scandium-aluminum garnet single crystal

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Keywords

ASJC Scopus subject areas

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