Structural, Optical, and Magnetic Properties of Erbium-Substituted Yttrium Iron Garnets
- 주제(기타) Chemistry, Multidisciplinary
- 설명문(일반) [Cho, Yujin; Kang, Seohui; Nahm, Yeon Woo; Cho, Suyeon] Ewha Womans Univ, Div Chem Engn & Mat Sci, Grad Program Syst Hlth Sci & Engn, ELTEC Coll Engn, Seoul 03760, South Korea; [Mohamed, Ahmed Yousef; Kim, Yejin; Cho, Deok-Yong] Jeonbuk Natl Univ, IPIT, Jeonju 54896, South Korea; [Mohamed, Ahmed Yousef; Kim, Yejin; Cho, Deok-Yong] Jeonbuk Natl Univ, Dept Phys, Jeonju 54896, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- OA유형 Green Published
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2022
- URI http://www.dcollection.net/handler/ewha/000000194556
- 본문언어 영어
- Published As https://doi.org/10.1021/acsomega.2c01334
- PubMed https://pubmed.ncbi.nlm.nih.gov/35910118
초록/요약
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.
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