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Modeling the magnetic properties and magnetocaloric effect of La0.7Sr0.3Mn0.9Ti0.1O3

Author name : Samia Yahyaoui
Publication Date : 2016-11-15
Journal Name : Journal of Alloys and Compounds

Abstract

We present a simple analysis based on the molecular field theory and on the Bean-Rodbell model to
justify the magnetocaloric effect (MCE) on La0.7Sr0.3Mn0.9Ti0.1O3. The modeling the magnetic properties
of the La0.7Sr0.3Mn0.9Ti0.1O3 was investigated. Using the Brillouin function we have determined the mean
field exchange parameter l and the total angular momentum J of the perovskite. The mean-field equation
of state leads the system to second order ferromagnetic (FM)-paramagnetic (PM) phase transition. The
expressions describing entropy and its change under the influence of magnetic field have been derived. A
large magnetic entropy (DSM) has been observed in our sample with a peak centered on the Curie
temperature (TC ¼ 210 K). The theoretical calculations are compared with experimental behavior.

Keywords

Perovskites, Mean-field theory, Bean-Rodbell model, Magnetocaloric effect

Publication Link

https://doi.org/10.1016/j.jallcom.2016.05.318

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