Giant and highly anisotropic magnetocaloric effects in single crystals of disordered-perovskite RCr0.5Fe0.5O3 (R = Gd, Er)open access
- Authors
- Shin, Hyun Jun; Kim, Jin Seok; Jeong, Ki Won; Kim, Jong Hyuk; Lee, Nara; Choi, Young Jai
- Issue Date
- May-2023
- Publisher
- NATURE PORTFOLIO
- Citation
- SCIENTIFIC REPORTS, v.13, no.1
- Journal Title
- SCIENTIFIC REPORTS
- Volume
- 13
- Number
- 1
- URI
- https://yscholarhub.yonsei.ac.kr/handle/2021.sw.yonsei/6661
- DOI
- 10.1038/s41598-023-34258-w
- ISSN
- 2045-2322
- Abstract
- Magnetic anisotropy is crucial in examining suitable materials for magnetic functionalities because it affects their magnetic characteristics. In this study, disordered-perovskite RCr0.5Fe0.5O3 (R = Gd, Er) single crystals were synthesized and the influence of magnetic anisotropy and additional ordering of rare-earth moments on cryogenic magnetocaloric properties was investigated. Both GdCr0.5Fe0.5O3 (GCFO) and ErCr0.5Fe0.5O3 (ECFO) crystallize in an orthorhombic Pbnm structure with randomly distributed Cr3+ and Fe3+ ions. In GCFO, the long-range order of Gd3+ moments emerges at a temperature of T-Gd (the ordering temperature of Gd3+ moments) = 12 K. The relatively isotropic nature of large Gd3+ moment originating from zero orbital angular momentum exhibits giant and virtually isotropic magnetocaloric effect (MCE), with a maximum magnetic entropy change of Delta S-M similar or equal to 50.0 J/kg center dot K. In ECFO, the highly anisotropic magnetizations result in a large rotating MCE characterized by a rotating magnetic entropy change Delta S-theta = 20.8 J/kg center dot K. These results indicate that a detailed understanding of magnetically anisotropic characteristics is the key for exploring improved functional properties in disordered perovskite oxides.
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