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Faraday isolators can prevent the front-end system from disturbance and damage caused by a back-reflected beam, so they are important elements in laser systems. As magneto-optical materials are the most important component in Faraday isolators, the studies on magneto-optical materials have attracted much attention these years. Tb3Al5O12 (TAG) ceramics are considered to be one of the most promising magneto-optical materials for visible to near-infrared wavelength band application because of their outstanding comprehensive magneto-optical performance. However, the optical quality of TAG ceramics needs further optimization to meet the application requirements. In this work, high optical quality (Tb1−xYx)3Al5O12 (x = 0, 0.05, 0.1, 0.2, and 0.3) magneto-optical ceramics were fabricated successfully by solid-state reaction sintering combined with hot isostatic pressing (HIP) post-treatment. All the ceramics obtained showed a single garnet phase for different values of x in the range studied. The addition of Y2O3 was found to suppress the secondary phase and improve optical quality significantly. The ceramic samples obtained had clear grain boundaries and possessed the in-line transmittance values of 82.9% at 1064 nm and 82.2% at 633 nm, respectively. The Verdet constants of (Tb1−xYx)3Al5O12 ceramics with x = 0, 0.05, 0.1, 0.2, and 0.3 were −188.1, −175.4, −168.5, −143.0, and −119.9 rad/(T·m), respectively. The thermal conductivity of TAG ceramics was found to be 5.23 W/(m·K) at 25 , and when 20% Y was substituted in place of Tb, the thermal conductivity decreased by only 9.4%.


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Effect of Y substitution on the microstructure, magneto-optical, and thermal properties of (Tb1−xYx)3Al5O12 transparent ceramics

Show Author's information Lixuan Zhang1,2Dianjun Hu1,2Xiao Li1,3Ziyu Liu1,2Chen Hu1Lexiang Wu1Tingsong Li1Dariusz Hreniak4Jiang Li1,2( )
Transparent Ceramics Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201899, China
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
Ganjiang Innovation Academy, Chinese Academy of Sciences, Ganzhou 341000, China
Institute of Low Temperature and Structure Research, Polish Academy of Sciences, Wroclaw 50-422, Poland

Abstract

Faraday isolators can prevent the front-end system from disturbance and damage caused by a back-reflected beam, so they are important elements in laser systems. As magneto-optical materials are the most important component in Faraday isolators, the studies on magneto-optical materials have attracted much attention these years. Tb3Al5O12 (TAG) ceramics are considered to be one of the most promising magneto-optical materials for visible to near-infrared wavelength band application because of their outstanding comprehensive magneto-optical performance. However, the optical quality of TAG ceramics needs further optimization to meet the application requirements. In this work, high optical quality (Tb1−xYx)3Al5O12 (x = 0, 0.05, 0.1, 0.2, and 0.3) magneto-optical ceramics were fabricated successfully by solid-state reaction sintering combined with hot isostatic pressing (HIP) post-treatment. All the ceramics obtained showed a single garnet phase for different values of x in the range studied. The addition of Y2O3 was found to suppress the secondary phase and improve optical quality significantly. The ceramic samples obtained had clear grain boundaries and possessed the in-line transmittance values of 82.9% at 1064 nm and 82.2% at 633 nm, respectively. The Verdet constants of (Tb1−xYx)3Al5O12 ceramics with x = 0, 0.05, 0.1, 0.2, and 0.3 were −188.1, −175.4, −168.5, −143.0, and −119.9 rad/(T·m), respectively. The thermal conductivity of TAG ceramics was found to be 5.23 W/(m·K) at 25 , and when 20% Y was substituted in place of Tb, the thermal conductivity decreased by only 9.4%.

Keywords: thermal properties, optical quality, magneto-optical materials, (Tb1−xYx)3Al5O12 ceramics

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Publication history
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Publication history

Received: 02 January 2024
Revised: 22 February 2024
Accepted: 06 March 2024
Published: 30 April 2024
Issue date: April 2024

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© The Author(s) 2024.

Acknowledgements

Acknowledgements

This work was supported by the National Key R&D Program of China (Nos. 2021YFE0104800 and 2023YFB3812000), the General Project of Shanghai Natural Science Foundation (No. 22ZR1471500), the International Partnership Program of Chinese Academy of Sciences (No. 121631KYSB20200039), the International Cooperation Project of Shanghai Science and Technology Commission (No. 20520750200), and National Center for Research and Development (Contract No. WPC2/1/SCAPOL/2021). Partial work was also financially supported by the Hengdian Group.

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This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).

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