Origin of magnetic properties in carbon implanted ZnO nanowires
學年 106
學期 2
出版（發表）日期 2018-05-17
作品名稱 Origin of magnetic properties in carbon implanted ZnO nanowires
作品名稱（其他語言）
著者 Wang, Y.F.; Shao, Y.C.; Hsieh, S.H.; Chang, Y.K.; Yeh, P.H.; Hsueh, H.C.; Chiou, J.W.; Wang, H.T.; Ray, S.C.; Tsai, H.M.; Pao, C.W.; Chen, C.H.; Lin, H.J.; Lee, J.F.; Wu, C.T.; Wu, J.J.; Chang, Y.M.; Asokan, K.; Chae, K.H.; Ohigashi, T.; Takagi, Y.; Yokoyama, T.; Kosugi, N.; Pong, W.F.
單位
出版者
著錄名稱、卷期、頁數 Scientific Reports 8(1), 7758
摘要 Various synchrotron radiation-based spectroscopic and microscopic techniques are used to elucidate the room-temperature ferromagnetism of carbon-doped ZnO-nanowires (ZnO-C:NW) via a mild C+ ion implantation method. The photoluminescence and magnetic hysteresis loops reveal that the implantation of C reduces the number of intrinsic surface defects and increases the saturated magnetization of ZnO-NW. The interstitial implanted C ions constitute the majority of defects in ZnO-C:NW as confirmed by the X-ray absorption spectroscopic studies. The X-ray magnetic circular dichroism spectra of O and C K-edge respectively indicate there is a reduction in the number of unpaired/dangling O 2p bonds in the surface region of ZnO-C:NW and the C 2p-derived states of the implanted C ions strongly affect the net spin polarization in the surface and bulk regions of ZnO-C:NW. Furthermore, these findings corroborate well with the first-principles calculations of C-implanted ZnO in surface and bulk regions, which highlight the stability of implanted C for the suppression and enhancement of the ferromagnetism of the ZnO-C:NW in the surface region and bulk phase, respectively.
關鍵字
語言 en
ISSN
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 GBR
公開徵稿
出版型式 ,電子版,紙本
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機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/115541 )