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Structural characterization, magnetic properties and magnetocaloric effects of La0.75Sr0.25Mn1–x Cr x O3 (x = 0.15, 0.20, and 0.25)

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Abstract

The effect of Cr doping on the structural, magnetic and magnetocaloric properties of perovskite manganites La0.75Sr0.25Mn1–x Cr x O3 (x = 0.15, 0.20, and 0.25) has been investigated. Crystalline structure and magnetic properties are investigated by using X-ray powder diffraction and magnetization measurements, respectively. All samples show a single phase and are found to crystallize in the distorted rhombohedral system with \( R\overline{3} \,c \) space group. A monotonous change of Curie temperature (T C), from 314 to 253 K, is observed when content doping increases. Substantial magnetic entropy change reaching 4.20 J/kg K is revealed. Relative cooling power was estimated as well. It was found to reach 289, 323, and 386 J/kg for x = 0.15, 0.20, and 0.25, respectively. Field dependence of the magnetic entropy change showing the power law dependence \( \Delta S_{\rm M} \propto \,\,\left( {\mu_{ 0} \rm H} \right)^{n} \) is also analyzed and discussed.

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Authors and Affiliations

  1. Laboratoire de Physique Appliquée, Faculté des Sciences de Sfax, Université de Sfax, BP 1171, 3000, Sfax, Tunisia

    Ah. Dhahri & E. Dhahri

  2. Institut Néel, CNRS et Université Joseph Fourier, BP 166, 38042, Grenoble, France

    E. K. Hlil

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  1. Ah. Dhahri
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Correspondence to Ah. Dhahri.

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Dhahri, A., Dhahri, E. & Hlil, E.K. Structural characterization, magnetic properties and magnetocaloric effects of La0.75Sr0.25Mn1–x Cr x O3 (x = 0.15, 0.20, and 0.25). Appl. Phys. A 116, 2077–2085 (2014). https://doi.org/10.1007/s00339-014-8404-5

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