Microstructures and Magnetic Properties of Single-Step Deposited Ce:YIG/YIG Bilayer Films With Different Layer Thickness Ratios

Cerium-substituted yttrium iron garnet (Ce:YIG) thin films are promising magneto-optical (MO) materials for the application in optical isolators. Ce:YIG can be grown on the YIG seed layer, and the change of layer thickness ratio for Ce:YIG to YIG may result in different magnetic properties. In this...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2022-10, Vol.58 (10), p.1-5
Main Authors: Sun, Xueyin, Zhao, Xuan, Zhang, Yuwei, Luo, Pan, Shao, Wenzhu, Xu, Chengyan, Zhen, Liang
Format: Article
Language:English
Subjects:
Bilayers
Cerium
Cerium-substituted yttrium iron garnet (Ce:YIG)
Coercivity
Ions
Iron
Magnetic anisotropy
magnetic oxides
Magnetic properties
Magnetic saturation
Magnetism
Optical reflection
Pulsed laser deposition
pulsed laser deposition (PLD)
Pulsed lasers
Thickness ratio
Thin films
Three-dimensional displays
X-ray scattering
Yttrium oxide
Yttrium-iron garnet
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Summary:Cerium-substituted yttrium iron garnet (Ce:YIG) thin films are promising magneto-optical (MO) materials for the application in optical isolators. Ce:YIG can be grown on the YIG seed layer, and the change of layer thickness ratio for Ce:YIG to YIG may result in different magnetic properties. In this work, Ce:YIG (Ce1Y2Fe5O12) to YIG (Y3Fe5O12) bilayer films, with different thickness ratios of 2:1, 4:1, 6:1, and 8:1, were grown by pulsed laser deposition (PLD); 2:1 and 4:1 films consist of pure YIG phase; 6:1 and 8:1 films consist of YIG phase, Y2Fe4O9 phase with hexagonal structure, and Y2O3 phase with cubic structure. Y2Fe4O9 and Y2O3 phases induce the decrease of saturation magnetization ( M_{s} ). The concentration of Fe2+ and Ce4+ ions increases with layer thickness ratio increasing, resulting in the decrease of saturation magnetization ( M_{s} ), coercivity ( H_{c} ), and magnetic anisotropy energy ( E ). It is found that the best magnetic properties, including H_{c} (26.9 Oe), M_{s} (140.6 emu/cm3), and E (257.5 J/cm3), are obtained in the 2:1 film.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2022.3191230