کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1596361 1002820 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Room temperature ferromagnetism in Zn–Mn–O
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Room temperature ferromagnetism in Zn–Mn–O
چکیده انگلیسی

Zn–Mn–O semiconductor crystallites with nominal manganese concentration x=0.01x=0.01, 0.04 and 0.10 were synthesized by a solid state reaction method using oxalate precursors. A sintering procedure was carried out in air at 500 and 900  ∘C. The samples were investigated by X-ray diffraction, magnetization measurements and electron paramagnetic resonance. X-ray diffraction spectra reveal that the dominant crystal phase in the Zn–Mn–O system corresponds to the wurtzite structure of ZnO. Room temperature ferromagnetism is observed in Zn–Mn–O samples with manganese concentrations x=0.01x=0.01 and 0.04 sintered at low temperature (500  ∘C). Saturation magnetization in the x=0.01x=0.01 sample is found to be 0.03μB/Mn at T=300K. The ferromagnetic phase seems to be developed by Zn diffusion into Mn-oxide grains.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 141, Issue 12, March 2007, Pages 641–644
نویسندگان
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