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Magneto-caloric properties of La0.7Ca0.3(Ni1−x Mn x )O3 compounds

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Abstract

The magneto-caloric effect and the magnetization behavior have been analyzed in the La0.7-Ca0.3(Ni1−x Mn x )O3 (x = 0.85, 0.88, 0.91, 0.94, 0.97, 1.00) compound. Samples were prepared by using a standard solid-state reaction in a stream of 5% H2/Ar gas. X-ray diffraction patterns revealed that all the samples had a single phase with an orthorhombic structure. The Curie temperature increased from 175 K to 269 K with increasing Mn concentration. The values of magnetic entropy change, ΔS M are also increased from 1.20 to 5.64 J/kg K with increasing of Mn content. The enhancement of the magnetic entropy change is believed to be due to the occurrence of the strong magnetic ordering between Mn-Mn atoms. The interesting features of this compound make it a competitive candidate as a working material in magnetic refrigeration applications.

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Authors and Affiliations

  1. Department of Physics and BK21 Physics Program, Chungbuk National University, Cheongju, 361-763, Korea

    K. S. Kim, Y. D. Zhang & S. C. Yu

  2. Department of Nano Science and Mechanical Engineering, Konkuk University, Chungju, 380-701, Korea

    B. S. Kang

Authors
  1. K. S. Kim
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  2. Y. D. Zhang
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  3. S. C. Yu
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  4. B. S. Kang
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Correspondence to S. C. Yu.

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Kim, K.S., Zhang, Y.D., Yu, S.C. et al. Magneto-caloric properties of La0.7Ca0.3(Ni1−x Mn x )O3 compounds. Journal of the Korean Physical Society 61, 1666–1669 (2012). https://doi.org/10.3938/jkps.61.1666

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