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http://dx.doi.org/10.4283/JMAG.2013.18.1.030

The Magnetic Entropy Change on La0.7Ba0.3Mn1-xFexO3 Compound  

Hwang, J.S. (BK21 Physics Program and Department of Physics, Chungbuk National University)
Jang, D.M. (BK21 Physics Program and Department of Physics, Chungbuk National University)
Kim, K.S. (BK21 Physics Program and Department of Physics, Chungbuk National University)
Lee, J.S. (Department of Precision Mechanical Engineering, Gangneung-Wonju National University)
Yu, S.C. (BK21 Physics Program and Department of Physics, Chungbuk National University)
Publication Information
Journal of Magnetics / v.18, no.1, 2013 , pp. 30-33 More about this Journal
Abstract
The magnetocaloric effect and magnetization behavior have been analyzed in the double-perovskite $La_{0.7}Ba_{0.3}Mn_{1-X}Fe_XO_3$ compound with the sintering temperature at 1273 K. Samples were fabricated by the conventional solid-state reaction method. X-ray diffraction measurement revealed that all the samples had a single phase in orthorhombic. Detailed investigations of the magnetic entropy behavior of the samples were discussed with the variation of $T_C$. The magnetic entropy changes, ${\Delta}S_M$ of approximately 0.36-1.14 J/kg K were obtained in the temperature range of 145-350 K for the $La_{0.7}Ba_{0.3}Mn_{1-X}Fe_XO_3$ compound. The enhancement of the magnetic entropy change is believed to be due to changes in the microstructure, which changes the magnetic part of the entropy of a solid around the magnetic ordering temperature.
Keywords
magnetic entropy change; perovskite materials; magnetization behavior;
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