Journal of Magnetics

The Korean Magnetics Society (한국자기학회)
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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)
  • Received : 2012.12.06
  • Accepted : 2013.02.01
  • Published : 2013.03.31
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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.

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References

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