کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1811699 1025600 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural, optical and magnetic properties of Zn1−xCoxO dilute magnetic semiconductors thin films by pulsed laser deposition
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Structural, optical and magnetic properties of Zn1−xCoxO dilute magnetic semiconductors thin films by pulsed laser deposition
چکیده انگلیسی

We fabricated Zn1−xCoxO (x=0.05) thin films on sapphire (0 0 0 1) substrates by the pulsed laser deposition (PLD) method at various temperatures in an oxygen-deficient ambient. X-ray diffraction (XRD) spectra, UV–vis transmittance spectra, X-ray photoelectron spectroscopy and photoluminescence (PL) were used for charecterization. All samples possessed the wurtzite structure with the preferential c-axis orientation; PL located at about 418, 450 and 471 nm was observed; Co2+ ions incorporated into the ZnO lattice with substitution for Zn2+ ions, oxygen vacancies, oxygen antisites and Zn interstitials existed in the as-samples. Results of magnetic property of the films investigated by an alternating gradient magnetometer (AGM) indicated that all samples take on room temperature ferromagnetism. It suggested that the ferromagnetism originated from the Co2+–Co2+ exchange interaction related to oxygen vacancies, oxygen antisites and Zn interstitials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 405, Issue 18, 15 September 2010, Pages 4027–4031
نویسندگان
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