کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8163006 | 1525213 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quenching effects on correlation between electrical and magnetic properties in Pr0.5Sr0.5MnO3 polycrystalline manganites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
In this work, we studied the effect of quenching on the magnetocaloric effect and the correlation between electrical and magnetic properties of two samples polycrystalline manganites Pr0.5Sr0.5MnO3. Sample I (quenched in water) exhibits a negative maximum of magnetic entropy change ÎS around its Curie temperature with ÎS=â4.61 J kgâ1 Kâ1 at a magnetic applied field of 8 T. Sample II (quenched in air) is characterized by the presence of two extrema of magnetic entropy change with a great positive value reaching 5.17 J kgâ1 Kâ1 for only 2 T magnetic field around its Neel temperature. Resistivity and magnetization were found to be related with the different relations Ï=Ï0exp(âM/α) and Ï=Ï0exp(âM2/α) for samples I and II respectively. From these relations associated to Maxwell-Weiss relation, we found the way to evaluate ÎS from resistivity and the obtained results were discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 433, 15 January 2014, Pages 122-126
Journal: Physica B: Condensed Matter - Volume 433, 15 January 2014, Pages 122-126
نویسندگان
A. Krichene, W. Boujelben, A. Cheikhrouhou,