Spectrometer based real-time magnetic Faraday rotation spectroscopy of Bi-YIG thin films

•Real-time magnetic Faraday rotation spectroscopy of Bi-YIG thin films is demonstrated.•Fiber-coupled spectrometer was used for the Faraday rotation spectroscopy.•The effect of annealing condition on the magnetic properties of Bi-YiG thin film was investigated. In this work, we have investigated the...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2019-07, Vol.482, p.61-65
Main Authors: Kang, Min-Gu, Dong Quoc, Viet, Surabhi, Srivathsava, Park, Byong-Guk, Jeong, Jong-Ryul
Format: Article
Language:English
Subjects:
Annealing
Bi-YIG
Bismuth
Faraday effect
Faraday rotation
Faraday rotation spectrometer
Glass substrates
Hysteresis loops
Magnetic properties
Magnetic thin films
Magneto-optical effects
Metal-organic decomposition (MOD)
Optical properties
Real time
Reliability analysis
Spectrum analysis
Thin films
Yttrium
Yttrium-iron garnet
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Summary:•Real-time magnetic Faraday rotation spectroscopy of Bi-YIG thin films is demonstrated.•Fiber-coupled spectrometer was used for the Faraday rotation spectroscopy.•The effect of annealing condition on the magnetic properties of Bi-YiG thin film was investigated. In this work, we have investigated the bismuth-substituted yttrium iron garnet (Bi-YIG) thin films prepared on glass substrate by modified metal-organic decomposition method. Real-time Faraday rotation spectrometer was used to characterize the magneto-optical properties of Bi-YIG films. The reliability of the measurement system and optimized analyzer setup was confirmed by comparing the Jones matrix calculations and measured results. The effect of annealing condition on the structural, magnetic and magneto-optical properties was investigated. A clear garnet-phase without secondary phase was observed for the Bi-YIG films annealed above 800 °C. Faraday rotation spectra of these films reveal the correlation between their crystallinity and magneto-optical properties. The highest Faraday rotation angle of −3.1 °/μm was achieved for 800 °C annealed sample. Simultaneous evaluation of real-time Faraday rotation spectra and the corresponding hysteresis loops can establish a path for the application of time-resolved magneto-optical spectroscopic analysis of magnetic thin films.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2019.03.035