کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1668011 1008861 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Intrinsic room temperature ferromagnetism in Zn0.92Co0.08O thin films prepared by pulsed laser deposition
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Intrinsic room temperature ferromagnetism in Zn0.92Co0.08O thin films prepared by pulsed laser deposition
چکیده انگلیسی
Zn0.92Co0.08O thin films were fabricated on p-type Si (100) and quartz substrates by pulsed laser deposition using a ZnCoO ceramic target. The structural and magnetic properties of the films were characterized by field emission scan electronic microscopy, x-ray diffraction, x-ray photoemission spectroscopy, UV-visible transmission spectra, extended x-ray absorption fine structure spectroscopy and physical property measurement system. Substitutional doping of Co2+ in ZnO lattice is demonstrated in the films. The as-deposited Zn0.92Co0.08O thin film displayed intrinsic room temperature ferromagnetism with saturation magnetization (Ms) of ~ 0.20μB/Co. The corresponding Ms increased to ~ 0.23μB/Co when annealed in vacuum and further to ~ 0.42μB/Co after annealed in hydrogen. In turn, the Ms dropped to the value of ~ 0.13μB/Co after annealed in oxygen. Our studies indicate that oxygen vacancy density plays a key role in mediating the ferromagnetism of the diluted magnetic semiconductor films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Thin Solid Films - Volume 519, Issue 10, 1 March 2011, Pages 3312-3317
نویسندگان
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