کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1619057 1516384 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural, magnetic and electrical properties of La0.67Pb0.33Mn1−xCoxO3 (0 ≤ x ≤ 0.3)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Structural, magnetic and electrical properties of La0.67Pb0.33Mn1−xCoxO3 (0 ≤ x ≤ 0.3)
چکیده انگلیسی

The structural, magnetic and electrical properties of La0.67Pb0.33Mn1−xCoxO3 (0 ≤ x ≤ 0.30) perovskites prepared by the sol–gel method were investigated. The rhombohedral distorted perovskite structure with space group R3¯c is observed in this series of materials while the average size and Co content are varied simultaneously. The Rietveld refinement of the structure shows that the substitution of Mn by Co in the Mn site changes the structure parameters such as the (Mn,Co)–O bond length and (Mn,Co)–O–(Mn,Co) angles. An increase in the (Mn,Co)–O bond length with increasing Co content leads to a decrease in the paramagnetic-ferromagnetic transition temperature TC and the metal-semiconductor transition temperature Tp.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 496, Issues 1–2, 30 April 2010, Pages 69–74
نویسندگان
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