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Prediction of magnetic and magnetocaloric properties in \(\hbox {Pr}_{0.8-x}\hbox {Bi}_{x}\hbox {Sr}_{0.2}\hbox {MnO}_{3}\) (\(x=0\), 0.05 and 0.1) manganites

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Abstract

In this work, we have investigated the magnetic and magnetocaloric properties of \(\hbox {Pr}_{0.8-x}\hbox {Bi}_{x}\hbox {Sr}_{0.2}\hbox {MnO}_{3}\) (\(x=0\), 0.05 and 0.1) polycrystalline manganites prepared by sol–gel route on the basis of a phenomenological model. Temperature dependence of magnetization indicates that all our samples exhibit a second order paramagnetic to ferromagnetic transition with a decrease in temperature. A correlation between experimental results and theoretical analysis based on a phenomenological model is investigated. The magnetic and magnetocaloric measurements are well simulated by this model. Under a magnetic applied field of 5 T, the theoretical absolute values of the maximum of magnetic entropy change \(\Delta S_{{\mathrm{Max}}}\) are found to be equal to 5.33, 3.33 and \(2.97\,\hbox {J}\,\hbox {kg}^{-1}\,\hbox {K}^{-1}\) for \(x=0\), 0.05 and 0.1 respectively. The relative cooling power and the specific heat capacity values are also estimated. The predicted results permit us to conclude that our compounds may be promising candidates for magnetic refrigeration at low temperatures.

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Acknowledgements

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

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Authors and Affiliations

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

    A Ben Jazia Kharrat & W Boujelben

  2. Institut Néel, CNRS-Université J. Fourier, 38042, Grenoble, BP 166, France

    E K Hlil

Authors
  1. A Ben Jazia Kharrat
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  2. E K Hlil
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  3. W Boujelben
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Correspondence to A Ben Jazia Kharrat.

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Kharrat, A.B.J., Hlil, E.K. & Boujelben, W. Prediction of magnetic and magnetocaloric properties in \(\hbox {Pr}_{0.8-x}\hbox {Bi}_{x}\hbox {Sr}_{0.2}\hbox {MnO}_{3}\) (\(x=0\), 0.05 and 0.1) manganites. Bull Mater Sci 42, 62 (2019). https://doi.org/10.1007/s12034-019-1739-y

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