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Effect of Fe Substitution on the Structural, Magnetic and Magnetocaloric Properties of Pr0.6La0.1Mg0.3Mn1−x Fe x O3 (0≤x≤0.3) Perovskite Manganites Prepared by Sol Gel Method

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Abstract

Studies of the structural, magnetic, and magnetocaloric properties of polycrystalline Pr0.6La0.1Mg0.3Mn1−x Fe x O3 (0≤x≤0.3) perovskite manganites were carried out. The compounds were synthesized using the sol–gel method. X-Ray diffraction (XRD) analysis using Rietveld refinement shows that all our compounds crystallize in the orthorhombic structure with the Pnma space group. The surface morphology and elemental analysis of both samples were carried out by scanning electron microscopy (SEM) and the energy dispersive X-ray technique (EDX), respectively. Magnetization measurements versus temperature under magnetic applied field of 0.05 T showed that all our investigated samples display a ferromagnetic-paramagnetic transition. The substitution of Mn by Fe leads to an increase of the Curie temperature T C from 64 K for x=0 to 380 K for x=0.3. The Arrott plots show that the phase transition is of second order. A large magnetic entropy change |ΔS M | deduced from isothermal magnetization curves has been recorded in the parent compound Pr0.6La0.1Mg0.3MnO3 reaching a maximum of 0.79 J/kg K under a magnetic applied field of 2 T close to T C . Our results on magnetocaloric properties suggest that the Pr0.6La0.1Mg0.3MnO3 compound is attractive as a possible refrigerant for low temperature magnetic refrigeration.

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Acknowledgements

This study has been supported by the Tunisian Ministry of Scientific Research and Technology and the Neel Institute.

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Authors and Affiliations

  1. Faculty of Sciences of Sfax, University of Sfax, B.P. 1171-3000, Sfax, Tunisia

    S. Zouari, A. Nasri & M. Ellouze

  2. Institute Néel, CNRS et Université Joseph Fourrier, B.P. 166, 38042, Grenoble Cedex 9, France

    E. K. Hlil

  3. National Engineering School of Sfax, B. P. W. 3038, Sfax, Tunisia

    F. Elhalouani

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  1. S. Zouari
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  2. A. Nasri
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  3. M. Ellouze
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Correspondence to S. Zouari.

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Zouari, S., Nasri, A., Ellouze, M. et al. Effect of Fe Substitution on the Structural, Magnetic and Magnetocaloric Properties of Pr0.6La0.1Mg0.3Mn1−x Fe x O3 (0≤x≤0.3) Perovskite Manganites Prepared by Sol Gel Method. J Supercond Nov Magn 27, 1473–1481 (2014). https://doi.org/10.1007/s10948-013-2435-6

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