کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1605083 1516208 2016 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling the magnetic properties and magnetocaloric effect of La0.7Sr0.3Mn0.9Ti0.1O3
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Modeling the magnetic properties and magnetocaloric effect of La0.7Sr0.3Mn0.9Ti0.1O3
چکیده انگلیسی


• Modeling the magnetic properties of La0.7Sr0.3Mn0.9Ti0.1O3 was performed.
• The mean field equation of state leads the system to second order phase transition.
• The expressions describing entropy under the influence of magnetic field have been derived.

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 λ 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 (−ΔSM) has been observed in our sample with a peak centered on the Curie temperature (TC = 210 K). The theoretical calculations are compared with experimental behavior.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 685, 15 November 2016, Pages 633–638
نویسندگان
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