Modeling the magnetic properties and magnetocaloric effect of La0.7Sr0.3Mn0.9Ti0.1O3
authors Yahyaoui, S; Khalfaoui, M; Kallel, S; Kallel, N; Amaral, JS; Ben Lamine, A
nationality International
journal JOURNAL OF ALLOYS AND COMPOUNDS
author keywords Perovskites; Mean-field theory; Bean-Rodbell model; Magnetocaloric effect
keywords PHASE-TRANSITIONS; ENTROPY CHANGE; PEROVSKITE
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 lambda 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 (-Delta S-M) has been observed in our sample with a peak centered on the Curie temperature (T-C = 210 K). The theoretical calculations are compared with experimental behavior. (C) 2016 Elsevier B.V. All rights reserved.
publisher ELSEVIER SCIENCE SA
issn 0925-8388
year published 2016
volume 685
beginning page 633
ending page 638
digital object identifier (doi) 10.1016/j.jallcom.2016.05.318
web of science category Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering
subject category Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
unique article identifier WOS:000382222300090
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