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Erschienen in:
18.07.2017
Structural properties, electrical behavior and estimation of the magnetocaloric effect in La0.6Sr0.4Mn0.9V0.1O3 compound from resistivity and phenomenological model
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 21/2017
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Abstract
An investigation of structural, electrical properties and magnetic entropy of La0.6Sr0.4Mn0.9V0.1O3 is presented. Rietveld refinement of X-ray diffraction patterns indicates a rhombohedral structure with space group R\(\bar 3\)c for La0.6Sr0.4Mn0.9V0.1O3 sample. The dependence of magnetization on the variation of temperature for La0.6Sr0.4Mn0.9V0.1O3 perovskite-type ceramic materials under an external magnetic field was modelled using a phenomenological model. The magnetocaloric properties of the polycrystalline manganite La0.6Sr0.4Mn0.9V0.1O3 based on resistivity measurements was investigated using, the equation \(\Delta S= - \alpha \int\limits_0^H {\frac{{\partial Ln(\rho )}}{{\partial T}}} {)_H}dH\) relates magnetic order to the transport behavior of the compound. The theoretical predictions of the magnetic entropy change (\(\Delta {S_M}\)) nearly match with the estimation of the \(\Delta {S_M}\) from resistivity analysis. Moreover, La0.6Sr0.4Mn0.9V0.1O3 sample shows a large magnetoresistance effect (35% at 5T field).