期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 456, 期 -, 页码 31-37出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2018.02.012
关键词
Magnetocaloric effect; Magnetic entropy change; Magnetic phase transformation
资金
- National Natural Science Foundation of China [11504266, 51676198, 51371075]
- Tianjin Natural Science Foundation [17JCQNJC02300, 17JCQNJC03100]
- National Key Foundation for Exploring Scientific Instrument of China [2014YQ120351]
The magnetic properties and magnetocaloric effect of EuTi1-xMnxO3 (x = 0-0.1) compounds are investigated. When the Ti4+ was substituted by Mn2+, the lattice constants were changed, the Eu3+ state and the oxygen vacancy generated. The exchange mechanisms were more complex among the Mn2+ 3d, the Eu 5d and Eu2+ 4f. The FM phase was dominant between AFM and FM as Mn substitute for Ti, which improve the MCE under low magnetic field. The values of -Delta S-M(max) are evaluated to 11.7 and 11.1 J/kg K for EuTi0.975Mn0.025O3 and EuTi0.95Mn0.05O3 compounds, under a magnetic field change of 1 T. And, the values of RC were obviously enhanced under the magnetic field changes of 1 and 2 T. Therefore, the giant reversible MCE makes these compounds promising candidates for magnetic refrigeration. (C) 2018 Elsevier B.V. All rights reserved.
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