Near Room-Temperature Magnetic Ordering in Doped Multiferroic Hexagonal YbFeO<sub>3</sub>
POSTER
Abstract
Hexagonal rare-earth ferrite RFeO3 family is a unique multiferroic material holding weak ferromagnetic moment, which is predicted to be coupled with trimerization. Until now, only the low temperature magnetic transitions at 120~170 K have been verified. We stabilize this structure in YbFeO3 with finely tuned Sc substitution level, and demonstrate a new near room-temperature magnetic ordering at Tc ~ 225 K in Yb0.42Sc0.58FeO3, accompanying the ferroelectric transition. The weak ferromagnetism is also unambiguously evidenced below Tc, which is originated from the magnetoelectric spin-lattice coupling. More importantly, three successive magnetic transitions at TR1 ~ 165 K, TR2 ~ 33 K and T* ~ 8.5 K have been observed, which may indicate complex interaction between the rare-earth and Fe ions magnetic moments. The present work pushes forward the progress to hunt for room-temperature multiferroics in hexagonal ferrites and related materials.
*This work was supported by the State Key Research Program of China (Program No. 2016YFA0300101), and the National Natural Science Foundation of China (Grant Nos. 11504048, 11774106, 11234005, 11374147, 51332006, 51322206).
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Presenters
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Lin Lin
- Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures, Nanjing University
- Nanjing University
- Laboratory of Solid State Microstructures and Innovative Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China