Structural, magnetic and magnetocaloric properties of (La1−xSmx)0.85K0.15MnO3 (x = 0.0, 0.1, 0.2 and 0.3) perovskite manganites
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Abstract
Abstract We have investigated effect of Sm ion substitution on structural, magnetic and magnetocaloric properties of sol-gel synthesized (La 1−x Sm x ) 0.85 K 0.15 MnO 3 (x = 0.0, 0.1, 0.2 and 0.3) perovskite manganites. X-ray diffraction analyses confirm that samples crystallize with rhombohedral symmetry in the R 3 c space group. The temperature dependence of magnetization measurements shows a clear ferromagnetic (FM) - paramagnetic (PM) phase transition with increasing temperature, and magnetic phase transition temperature ( T C ) decreases with increasing Sm concentration. For Sm concentrations (x = 0.0, 0.1, 0.2 and 0.3), magnetic field dependence of the maximum magnetic entropy change ( − ∆ S M max ) are determined up to 5 T to be 7.32, 3.37, 3.28 and 2.70 J kg −1 K −1 , respectively. These experimental values are also in good agreement with the calculation of the magnetic entropy change using Landau theory.
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Research context
OpenAlex topics: Magnetic and transport properties of perovskites and related materials · Advanced Condensed Matter Physics · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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