Journal
CURRENT APPLIED PHYSICS
Volume 18, Issue 2, Pages 241-245Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cap.2017.11.006
Keywords
Bi-YIG; Metal-organic decomposition; Faraday rotation; Magneto-optics; Heating rate
Funding
- National Research Foundation of Korea (NRF) - Korean government [2016R1A2B4012847, 2013R1A4A1069528]
- DGIST R&D Program of the Ministry of Science, ICT and Future Planning [17-BT-02]
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This work investigated the effects of heating rate and annealing on the magneto-optical properties of bismuth-substituted yttrium iron garnet (Bi-YIG) thin films on glass and (111)-oriented single-crystalline gadolinium gallium garnet (GGG) substrates fabricated by metal-organic decomposition (MOD). We modified the MOD method by eliminating the pre-annealing process. We performed annealing at various temperatures to determine the optimal temperature for obtaining the Bi-YIG phase. We then annealed at the optimized temperature using various heating rates. The optimal conditions were annealing for 1 h at 750 degrees C at a heating rate of 30 degrees C/min on GGG to obtain highly crystallized fine grains. The Faraday rotation for this film was about -10.5 degrees/mu m. The optimized heating rate enhanced the magneto-optical properties due to improved crystallinity and saturated magnetization. The Bi-YIG thin films prepared by this prescribed MOD method exhibited excellent magneto-optical performance and are potential candidates for applications in optical devices. (c) 2017 Elsevier B.V. All rights reserved.
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