کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9803478 | 1516468 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure, magnetic and magnetoresistive properties of La0.7Sr0.3Mn1âxSnxO3 samples (0 â¤Â x â¤Â 0.20)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Structural, magnetic, and transport properties of polycrystalline La0.7Sr0.3Mn1âxSnxO3 have been experimentally investigated. Single-phase samples were obtained in the range 0 â¤Â x â¤Â 0.20 by a conventional solid-state reaction method in air. The substitution of Sn4+ at the Mn site results in a significant lattice expansion, a reduction in the Curie temperature TC and in the magnetic moment per Mn ion. In addition, gradual changes in the resistivity behaviour are observed in the Sn-doped samples leading to an enhancement of the magnetoresistance at low doping ratio. The results are analysed in relation to the variation in the Mn3+-O2â-Mn4+ network and to the magnetic disorder caused by the presence of the large and nonmagnetic Sn4+ ions in the Mn sublattice.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 399, Issues 1â2, 16 August 2005, Pages 20-26
Journal: Journal of Alloys and Compounds - Volume 399, Issues 1â2, 16 August 2005, Pages 20-26
نویسندگان
N. Kallel, K. Fröhlich, S. Pignard, M. Oumezzine, H. Vincent,