کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5447579 1511501 2017 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Metal-semiconductor transition and Seebeck inversion in CoFe2O4 nanoparticles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Metal-semiconductor transition and Seebeck inversion in CoFe2O4 nanoparticles
چکیده انگلیسی
A Semiconductor to metal transition has been observed in hydrothermally synthesized CoFe2O4 (CFO) nanoparticles. Temperature dependent Seebeck coefficient was measured in order to confirm the type of majority charge carriers and conductivity vs. temperature measurement was performed to get the activation energy. The CFO nanoparticles shows p-type semiconducting behaviour at lower temperature as confirmed by the sign of Seebeck coefficient and at elevated temperatures a sign inversion in Seebeck voltage was observed. The p-type and n-type semiconducting behaviour have been attributed to hopping of holes and electrons between Co3+-Co2+ and Fe2+-Fe3+ respectively dominating at different temperatures.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 105, June 2017, Pages 86-89
نویسندگان
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