کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1860708 1037448 2009 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The magnetic property of carbon-doped TiO2
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
The magnetic property of carbon-doped TiO2
چکیده انگلیسی

Despite carbon and TiO2 are nonmagnetic, we detected ferromagnetism at room temperature over samples of carbon-doped TiO2. The materials were prepared by standard solid-state reaction and sintered either in an argon or nitrogen atmosphere. According to Raman results, the samples sintered in nitrogen showed lower D-bond (disordered) and G-bond (graphitic) concentration, plausibly a result of nitrogen incorporation into the carbon-doped TiO2 materials. All the samples are ferromagnetic at room temperature. With increase of carbon concentration, there is decline of magnetic moment per carbon (in carbide form) due to antiferromagnetic interaction among the carbon atoms. Compared to the sample sintered in argon, the one sintered in nitrogen is lower in magnetic moment due to partial replacement of carbon atoms by nitrogen atoms. We found that the electrons-mediated mechanism is more suitable than the holes-mediated one for the explanation of ferromagnetism of the carbon-doped TiO2 materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 373, Issue 40, 28 September 2009, Pages 3684–3687
نویسندگان
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