TY - JOUR
T1 - Structural, Optical, and Magnetic Properties of Erbium-Substituted Yttrium Iron Garnets
AU - Cho, Yujin
AU - Kang, Seohui
AU - Nahm, Yeon Woo
AU - Mohamed, Ahmed Yousef
AU - Kim, Yejin
AU - Cho, Deok Yong
AU - Cho, Suyeon
N1 - Publisher Copyright:
© 2022 American Chemical Society. All rights reserved.
PY - 2022/7/26
Y1 - 2022/7/26
N2 - We synthesized a series of slightly erbium-substituted yttrium iron garnets (Er:YIG), Y3-xErxFe5O12at 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 (MR) and coercive field (HC) 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.
AB - We synthesized a series of slightly erbium-substituted yttrium iron garnets (Er:YIG), Y3-xErxFe5O12at 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 (MR) and coercive field (HC) 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.
UR - http://www.scopus.com/inward/record.url?scp=85135723797&partnerID=8YFLogxK
U2 - 10.1021/acsomega.2c01334
DO - 10.1021/acsomega.2c01334
M3 - Article
AN - SCOPUS:85135723797
SN - 2470-1343
VL - 7
SP - 25078
EP - 25086
JO - ACS Omega
JF - ACS Omega
IS - 29
ER -