کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5490554 1524793 2017 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Thermoelectric power and DC conductivity of Li-Cu ferrite
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Thermoelectric power and DC conductivity of Li-Cu ferrite
چکیده انگلیسی
Thermoelectric power (Seebeck coefficient S) and dc conductivity of Li-Cu ferrite in chemical formula Li0.5-0.5xCuxFe2.5-.5xO4 (where x=0.0, 0.1, 0.3, 0.5, 0.7, 0.9 and1.0) were studied in a wide range of temperature from 300 up to 930 K. On the basis of the sign of Seebeck coefficient all the compositions of 0≤ x≤0.9 are n-type semiconductors except the sample of x=1.0 (CuFe2O4) is p-type at room temperature. It was noticed that the sample of x=1.0 converted to n-type at 350 K, but for the sample of x=0.9, it was expected to convert from n-type to p-type at 240 K. The Fermi energy at absolute zero EF (0) and the density of charge carriers (n) or (p) were determined. From the obtained results, the conduction mechanism of Li-Cu ferrite was discussed. Also, an energy band scheme was suggested.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 428, 15 April 2017, Pages 119-124
نویسندگان
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