Coexistence and Coupling of Multiple Charge Orderings and Spin States in Hexagonal Ferrite
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.
- Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Dept.; Zhengzhou University (China)
- Univ. of Arkansas, Fayetteville, AR (United States)
- Technical Univ. of Denmark, Lyngby (Denmark)
- Fudan Univ., Shanghai (China)
The coupling between charge and spin orderings in strongly correlated systems plays a crucial role in fundamental physics and device applications. As a candidate of multiferroic materials, LuFe2O4 with a nominal Fe2.5+ valence state has the potential for strong charge–spin interactions; however, these interactions have not been fully understood until now. Here, combining complementary characterization methods with theoretical calculations, two types of charge orderings with distinct magnetic properties are revealed. The ground states of LuFe2O4 are decided by the parallel/antiparallel coupling of both charge and spin orderings in the adjacent FeO double layers. Whereas the ferroelectric charge ordering remains ferrimagnetic below 230 K, the antiferroelectric ordering undergoes antiferromagnetic–ferrimagnetic–paramagnetic transitions from 2 K to room temperature. This study demonstrates the unique aspects of strong spin-charge coupling within LuFe2O4. Our results shed light on the coexistence and competing nature of orderings in quantum materials.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NSFC); US Department of the Navy, Office of Naval Research (ONR); National Key Research and Development Program of China
- Grant/Contract Number:
- SC0012704; 52072345; 11804304; 12074071; N00014-20-1-2834; N00014-17-1-2818; d N00014-21-1-2086; 2016YFA0300702
- OSTI ID:
- 1812506
- Report Number(s):
- BNL-221969-2021-JAAM; TRN: US2213250
- Journal Information:
- Nano Letters, Vol. 21, Issue 13; ISSN 1530-6984
- Publisher:
- American Chemical SocietyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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