کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1489770 992312 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Room temperature ferromagnetism in Co doped ZnO within an optimal doping level of 5%
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Room temperature ferromagnetism in Co doped ZnO within an optimal doping level of 5%
چکیده انگلیسی

We report on the structural, micro-structural and magnetic properties of Zn1−xCoxO (0 ≤ x ≤ 0.1) system. Electron probe micro-structural analysis on 5% Co doped ZnO indicates the presence of segregated cobalt oxide which is also confirmed from the Co 2p core level X-ray photoelectron spectrum. The presence of oxygen defects in lower percentage of Co doped ZnO (≤5%) enhances the carrier mediated exchange interaction and thereby enhancing the room-temperature ferromagnetic behaviour. Higher doping percentage of cobalt (>5%) creates weak link between the grains and suppresses the carrier mediated exchange interaction. This is the reason why room temperature ferromagnetism is not observed in 7% and 10% Co doped ZnO.

Figure optionsDownload as PowerPoint slideHighlights
► Zn1−xCoxO ((0 ≤ x ≤ 0.1)) system synthesized by solid state reaction technique.
► Observation of room temperature ferromagnetism for 3 and 5% Co doped ZnO.
► XPS and EPMA studies predict the occurrence of segregated CoO clusters.
► Suppresses ferromagnetic ordering in higher doping percentage of Co (>5%).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 47, Issue 6, June 2012, Pages 1417–1422
نویسندگان
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