کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1793553 | 1023678 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of substrate temperature on the room-temperature ferromagnetism of Cu-doped ZnO films
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Wurtzite structure ZnO films doped with ~2 at% Cu were deposited at substrate temperatures (Ts) from 350 to 600 °C by helicon magnetron sputtering. All the films exhibited room-temperature (RT) ferromagnetism (FM) and the maximum saturation magnetization (Ms) was 1.2 emu/cm3 (~0.15 μB/Cu). Cu ions were mainly in a divalent state as identified by X-ray photoelectron spectroscopy. FM tended to increase with decreasing Ts, and vacuum annealing enhanced the Ms. These results suggested that oxygen vacancies and/or zinc interstitials might contribute to the ferromagnetic performance. Thus, the observed FM was explained in terms of the defect related mechanism.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 311, Issue 17, 15 August 2009, Pages 4270-4274
Journal: Journal of Crystal Growth - Volume 311, Issue 17, 15 August 2009, Pages 4270-4274
نویسندگان
Fan-Yong Ran, Masaki Tanemura, Yasuhiko Hayashi, Takehiko Hihara,