期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 401, 期 -, 页码 612-617出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2015.10.076
关键词
Complex perovskites; Magnetic properties; Combustion synthesis; Spin reorientation; Magnetocaloric effect; Inverse magnetocaloric effect
资金
- CAPES (PDSE Grant) [14354/13-6]
- CNPq
- FAPITEC/SE
In this paper, we have investigated the physical properties of SmFe0.5Mn0.5O3 complex perovskite samples, synthesized by means of combustion reaction method. X-ray powder diffraction indicates the formation of single phase perovskite with orthorhombic structure. Low magnetic field measurements show remarkable transition at 234 K related to spin reorientation. The magnetocaloric effect shows two peaks related to magnetic behavior changes, at 18 K and at 234 K. The transition about 234 K presents inverse magnetocaloric effect. The entropy variation from magnetocaloric effect shows power law as function of applied magnetic field with maximum entropy change 5.6 J/kg K with field variation of 70 kOe. Critical exponents extracted from Delta S vs. H presents a remarkable sharp peak near antiferromagnetic to weak ferromagnetic transition temperature. (C) 2015 Elsevier B.V. All rights reserved.
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