کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7990642 | 1516130 | 2018 | 37 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Study of magnetic structure and electrical-transport properties of La1âyBayMn1âxFexO3 (yâ¯=â¯0.15, 0.40) perovskite manganites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An O 2p itinerant-electron model for magnetic oxides, which is similar to the O 2p hole-carrier model proposed by Alexandrov et al. [Phys. Rev. Lett. 96 (2006) 117003], was used to explain the magnetic and electrical-transport properties of two series of samples with the nominal composition La1âyBayMn1âxFexO3 (0.00â¯â¤â¯xâ¯â¤â¯0.20; yâ¯=â¯0.15, 0.40). The samples were prepared using the sol-gel method, and X-ray diffraction patterns showed that all samples were single-phase ABO3 perovskite structures. The magnetic and electrical-transport properties of the samples were characterized. Interesting phenomena were observed for the magnetic moment, μobs, of the samples at 10â¯K: μobs of the samples with yâ¯=â¯0.15 decreased approximately linearly when the Fe-doping level was increased from zero to xâ¯=â¯0.2. However, there was a characteristic Fe-doping level, xCâ¯=â¯0.10, for the samples with yâ¯=â¯0.40. When xâ¯â¤â¯xC, μobs decreased very slowly; when xâ¯>â¯xC, μobs decreased rapidly. These interesting phenomena suggest that the samples had a canted magnetic structure, but the cant angle of the samples with yâ¯=â¯0.15 was smaller than that of the samples with yâ¯=â¯0.40. These magnetic structures were further confirmed by the electrical-transport properties of the samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 764, 5 October 2018, Pages 239-249
Journal: Journal of Alloys and Compounds - Volume 764, 5 October 2018, Pages 239-249
نویسندگان
J.J. Qian, Z.Z. Li, W.H. Qi, L. Ma, G.D. Tang, Y.N. Du, M.Y. Chen,