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Structural, Optical, and Magnetic Properties of Erbium-Substituted Yttrium Iron Garnets
- Title
- Structural, Optical, and Magnetic Properties of Erbium-Substituted Yttrium Iron Garnets
- Authors
- Cho, Yujin; Kang, Seohui; Nahm, Yeon Woo; Mohamed, Ahmed Yousef; Kim, Yejin; Cho, Deok-Yong; Cho, Suyeon
- Ewha Authors
- 조수연
- SCOPUS Author ID
- 조수연
- Issue Date
- 2022
- Journal Title
- ACS OMEGA
- ISSN
- 2470-1343
- Citation
- ACS OMEGA vol. 7, no. 29, pp. 25078 - 25086
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- We synthesized a series of slightly erbium-substituted yttrium iron garnets (Er:YIG), Y3-xErxFe5O12, at different Er concentrations (x = 0, 0.01, 0.05, 0.10, and 0.20) using a solid-state reaction and investigated their structural, magnetic, and optical properties as a function of Er concentration. The volume of the unit cell slightly increased with Er concentration and Er atoms predominately replaced Y atoms in the dodecahedrons of YIG. The optical properties exhibited certain decreases in reflectance in the 1500-1600 nm wavelength range due to the presence of Er3+. Despite the many unpaired 4f electrons in Er3+, the total magnetic moments of Er:YIG showed similar trends with temperatures and magnetic fields above 30 K. An X-ray magnetic circular dichroism study confirmed the robust Fe 3d magnetic moments. However, the magnetic moments suddenly decreased to below 30 K with Er substitution, and the residual magnetism (M-R) and coercive field (H-C) in the magnetic hysteresis loops decreased to below 30 K with Er substitution. This implies that Er substitution in YIG has a negligible effect on magnetic properties over a wide temperature range except below 30 K where the Er 4f spins are coupled antiparallel to the majority Fe 3d spins. Our studies demonstrated that above 30 K the magnetic properties of YIG are retained even with Er substitution, which is evidence that the Er doping scheme is applicable for YIG-based magneto-optical devices in the mid-infrared regime.
- DOI
- 10.1021/acsomega.2c01334
- Appears in Collections:
- 공과대학 > 화공신소재공학과 > Journal papers
- Files in This Item:
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