Structural, Magnetic and Magnetocaloric Study of Polycrystalline (1−x)La0.65Ca0.35MnO3/xCr2O3 Composites

Magnetic and magnetocaloric properties of polycrystalline (1− x )La 0.65 Ca 0.35 MnO 3 / x Cr 2 O 3 (0≤ x ≤ 0.3) composites were investigated. Our composites were elaborated using the solid-state reaction at high temperature. Polycrystalline La 0.65 Ca 0.35 MnO 3 (LCMO) was synthesized using the sol...

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Bibliographic Details
Published in:Journal of superconductivity and novel magnetism 2015-02, Vol.28 (3), p.1065-1070
Main Authors: Marzouki-Ajmi, A., Cheikhrouhou-Koubaa, W., Koubaa, M., Cheikhrouhou, A.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Condensed Matter Physics
Magnetic Materials
Magnetism
Original Paper
Physics
Physics and Astronomy
Strongly Correlated Systems
Superconductivity
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Summary:Magnetic and magnetocaloric properties of polycrystalline (1− x )La 0.65 Ca 0.35 MnO 3 / x Cr 2 O 3 (0≤ x ≤ 0.3) composites were investigated. Our composites were elaborated using the solid-state reaction at high temperature. Polycrystalline La 0.65 Ca 0.35 MnO 3 (LCMO) was synthesized using the solid-state reaction at high temperature while for Cr 2 O 3 we used a commercial product. X-ray diffraction patterns show that the parent compound La 0.65 Ca 0.35 MnO 3 is single phase without any detectable impurity and crystallizes in the orthorhombic structure with Pbnm space group. Magnetocaloric effect of our composite materials in the vicinity of the magnetic transition temperatures was investigated. The maximum of the magnetic entropy change | Δ S M max | is found to be 5.5, 5.12, 4.5, and 3.12 J kg −1 K −1 for x = 0,0.1,0.2, and 0.3 under a magnetic field change of 5 T, respectively.
ISSN:1557-1939
1557-1947
DOI:10.1007/s10948-014-2892-6