کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9837394 1525275 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electronic properties of field aligned CrO2 powders
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Electronic properties of field aligned CrO2 powders
چکیده انگلیسی
We have investigated in detail the electronic transport properties of half metallic CrO2 powder-based devices, fabricated using optical lithography and field alignment technique. A transition in the conduction mechanism from spin-dependent intergranular tunneling to inelastic hopping was observed at 215 K. This transition temperature shifts to 230 K in the presence of 10 kOe field cooling due to reduction of the spin-independent hopping conductance channel. I-V characteristics exhibit strong temperature dependence and are non-linear even at room temperature. Our experimental results are in good agreement with a simple theoretical model. A novel 'double switching' phenomenon was observed in the I-V curves below the transition temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 368, Issues 1–4, 1 November 2005, Pages 131-138
نویسندگان
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