Magnetic entropy-change in La0.67−xBixCa0.33MnO3 compound

descriptionPublicationkeyboard_double_arrow_right Article 01 Oct 2006 English Publisher:Elsevier BVJournal:Journal of Magnetism and Magnetic Materials, volume 305, pages 452-456 (issn: 0304-8853,

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Authors: S. Atalay; V.S. Kolat; H. Gencer; H.I. Adiguzel;

doi: 10.1016/j.jmmm.2006.02.082

Magnetic entropy-change in La0.67−xBixCa0.33MnO3 compound

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Abstract

Abstract Bi doped lanthanum manganites with the chemical composition of La0.67−xBixCa0.33MnO3 ( x = 0 , 0.05, 0.1, 0.2) were prepared by the standard solid-state process. The Curie temperatures were measured to be 267 K for x = 0 , 248 K for x = 0.05 , 244 K for x = 0.1 and 229 K for x = 0.2 samples. It was found that the maximum value of the magnetic entropy change ∣ΔSm∣ has reached the highest value of 6.08 J/kg K at 3 T for the composition with x = 0.05 . Nearly the same maximum entropy change was observed for the x = 0 sample. A large decrease in the magnitude of the entropy change was observed for the x = 0.2 sample.

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