کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803561 | 1516469 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Magnetic entropy change and magnetotransport in Gd doped La-Sr-Mn-O perovskite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Magnetic entropy change and magnetotransport in Gd doped La-Sr-Mn-O perovskite Magnetic entropy change and magnetotransport in Gd doped La-Sr-Mn-O perovskite](/preview/png/9803561.png)
چکیده انگلیسی
Magnetic entropy change (ÎSM), magnetoresistance (MR) and resistivity (Ï) have been studied in a series of bulk polycrystalline manganites (La1âxGdx)0.67Sr0.33MnO3 (x = 0.1-0.7) with fixed carrier concentration. These effects, as well as the Curie temperature Tc, are all influenced much by the average ionic radius of the La site , which decreases monotonously with the increase of the Gd content. As the doping level x increases, a structural phase transition from rhombohedral to orthorhombic is also observed in these samples. For the x = 0.6 sample, the maximum |ÎSM| at Tc in a field change of 10 Oe is 3.2 J/kg K, and for the x = 0.7 sample, the maximum MR in a magnetic field of 40 kOe is 27,700%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 398, Issues 1â2, 2 August 2005, Pages 184-187
Journal: Journal of Alloys and Compounds - Volume 398, Issues 1â2, 2 August 2005, Pages 184-187
نویسندگان
Songling Huang, Xugao Cui, Dunhui Wang, Zhida Han, Youwei Du,