کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8152545 | 1524755 | 2018 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetocaloric properties of the A-site co-doping double-perovskite of Sr2FeMoO6
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
In this paper, the effect of Gd/Ba co-doping on magnetocaloric properties for Sr2FeMoO6 is presented. Double-perovskite (Sr2-3xGdxBa2x)FeMoO6 (0.00â¯â¤â¯xâ¯â¤â¯0.20) were prepared by the solid reaction method. X-ray diffraction results showed that all samples were single phase and belonged to I4/m space group. X-ray photoelectron spectroscopy analysis of (Sr2â3xGdxBa2x)FeMoO6 samples showed that proportional variations in Fe3+/Fe2+ and Mo5+/Mo6+ were found under Gd/Ba co-doping. Field-cooled magnetization curves indicated that Gd/Ba co-doping led to the Curie temperature (Tc) drop from 394â¯K to 357â¯K. Arrot plots analysis of samples revealed a second-order magnetic transition. The magnetic entropy change of all samples increased initially and then decreased with temperature, and all samples exhibited the maximum magnetic entropy change near Tc. The maximum magnetic entropy change of samples in the magnetic field of 2T decreased from 0.72â¯Jâ¯Kâ1â¯kgâ1 to 0.54â¯Jâ¯Kâ1â¯kgâ1 because of Gd/Ba co-doping. Relative cooling power decreased correspondingly.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 466, 15 November 2018, Pages 133-137
Journal: Journal of Magnetism and Magnetic Materials - Volume 466, 15 November 2018, Pages 133-137
نویسندگان
Yanchun Hu, Tengyu Guo, Xianwei Wang, Yawen Cui, Weixia Li, Xiangyu Zhao, Hongyan Liu,