کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10654283 | 1002959 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural, magnetic and transport properties in the manganites La0.7Sr0.3âxTexMnO3 (0â¤xâ¤0.15)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The effect of Te-doping at La-site on structural, magnetic and transport properties in the manganites La0.7Sr0.3âxTexMnO3 (0â¤xâ¤0.15) has been investigated. All samples show a rhombohedral structure with the space group R3¯C. It shows that the Mn-O-Mn bond angle decreases and the Mn-O bond length increases with the increase of Te content. The Curie temperature TC decreases with increasing Te-doping level, in contrast, the magnetization magnitude of Te-doping samples at low temperatures increase with increasing x as xâ¤0.05 and then decrease with further increasing x to 0.15. The results are discussed in terms of the combined effects of the opening of the new double exchange (DE) channel between Mn2+-O-Mn3+ due to the introduction of Mn2+ ions because of the substitution of Te4+ for Sr2+ and the reduction of the transfer integral b due to the decrease of the Mn-O-Mn bond angle.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 134, Issue 7, May 2005, Pages 443-447
Journal: Solid State Communications - Volume 134, Issue 7, May 2005, Pages 443-447
نویسندگان
J. Yang, Y.Q. Ma, B.C. Zhao, W.J. Lu, R. Ang, W.H. Song, Y.P. Sun,