کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8000367 1516274 2015 25 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Near room temperature magneto-transport (TCR & MR) and magnetocaloric effect in Pr2/3Sr1/3MnO3:Ag2O composite
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Near room temperature magneto-transport (TCR & MR) and magnetocaloric effect in Pr2/3Sr1/3MnO3:Ag2O composite
چکیده انگلیسی
The magneto-transport and magnetocaloric effect in Pr2/3Sr1/3MnO3:Ag2O (PSMO:Ag) with Ag2O (10-30 mol%) have been studied by resistivity and magnetization measurements. Temperature coefficient of resistance (TCR), magneto-resistance (MR) and magnetocaloric properties of the composite have shown different responses to Ag addition. Rietveld refinement confirms single phase crystalline structure with orthorhombic Pbnm space group and presence of silver metal as well. TCR changes randomly with Ag, increasing initially to 7.8% K−1 for PSMO:Ag10 composite which then decreases marginally with increasing Ag content. MR has been found to reach a maximum value of 30.5% at 1 T applied field for PSMO:Ag10 composite. Magnetic entropy change (ΔSM) increases with increasing Ag content and is found to be 3.5 J kg−1 K−1 (1 T), 6.1 J kg−1 K−1 (2 T) and 8.4 J kg−1 K−1 (3 T) for PSMO:Ag30 composite at 285 K. The maximum refrigeration capacity of 39.5 J kg−1 (1 T), 91.0 J kg−1 (2 T) and 107.7 J kg−1 (3 T) has been found for the PSMO:Ag20 composite. PSMO:Ag composite exhibits potential for bolometric, magnetic sensing and magnetic refrigerating applications near room temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 619, 15 January 2015, Pages 151-156
نویسندگان
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