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Structural, magnetic and magnetocaloric investigation of La0.7−xDyxCa0.3MnO3 (x = 0.00, 0.01 and 0.03) manganite

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Abstract

La0.7−xDyxCa0.3MnO3 (x = 0.00, 0.01 and 0.03) compounds were prepared using sol–gel method. X- ray diffraction and magnetic measurements were used to investigate the effects of Dy doping on the physical properties of La0.7−xDyxCa0.3MnO3. XRD data have been analyzed by Rietveld refinement technique. Moreover they crystallized in an orthorhombic structure with Pnma space group. Magnetization as a function of temperature has shown that these compounds exhibit a transition from a ferromagnetic to paramagnetic phase with increasing temperature. The \(\Delta {\text{S}}_{{\text{M}}}^{{{\text{max}}}}\) in a magnetic field change of 5 T is found to be 6.79, 10.15 and 3.97 J Kg−1 K−1 for x = 0.00, 0.01 and 0.03, respectively. At this value of magnetic field, the relative cooling power (RCP) is found to be 191, 155 and 157 J Kg−1 for x = 0.00, 0.01 and 0.03, respectively. Our result on magnetocaloric properties suggests that La0.7−xDyxCa0.3MnO3 (x = 0.00, 0.01 and 0.03) compounds are attractive as possible refrigerants for near room temperature magnetic refrigeration.

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Acknowledgements

This work was supported by the Tunisian Ministry of Higher Education and Scientific Research.

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Authors and Affiliations

  1. Laboratoire des Technologies des Systèmes Smart LT2S, Sakiet Ezzit, 3021, Sfax, Tunisia

    I. Sfifir Debbebi, W. Cheikhrouhou-Koubaa & A. Cheikhrouhou

  2. Centre de Recherches en Numérique de Sfax, Cité El Ons, Route de Tunis, Km 9, Sfax. BP 275, Sakiet Ezzit, 3021, Sfax, Tunisia

    I. Sfifir Debbebi, W. Cheikhrouhou-Koubaa & A. Cheikhrouhou

  3. Institut Néel, CNRS et Université Joseph Fourier, BP 166, 38042, Grenoble Cedex 9, France

    E. K. Hlil

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  1. I. Sfifir Debbebi
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Sfifir Debbebi, I., Cheikhrouhou-Koubaa, W., Cheikhrouhou, A. et al. Structural, magnetic and magnetocaloric investigation of La0.7−xDyxCa0.3MnO3 (x = 0.00, 0.01 and 0.03) manganite. J Mater Sci: Mater Electron 28, 16965–16972 (2017). https://doi.org/10.1007/s10854-017-7618-7

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  • DOI: https://doi.org/10.1007/s10854-017-7618-7

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