Ferromagnetic anisotropy of carbon-doped ZnO nanoneedles fabricated by ion beam technique

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• 作者：C.S. Wei^a ; S.P. Lau^a ; ^{apsplau@polyu.edu.hk} ; M. Tanemura^b ; M. Subramanian^b ; Y. Akaike^b
• 关键词：75.75.Cd ; 75.50.Pp ; 75.30.Gw
• 刊名：Applied Surface Science
• 出版年：2012
• 期刊代码：6_01694332
• 类别：ms
• 出版时间：1 May, 2012
• 卷：258
• 期：14
• 页码：5486-5489
• 文件大小：711 K

摘要

Carbon-doped ZnO (ZnO:C) nanoneedles were fabricated using ion beam irradiation with a simultaneous supply of carbon at room temperature. The structure and the magnetic properties of the ZnO:C nanoneedles were investigated. Hysteresis loops and zero-field cooling (ZFC) and field cooling (FC) curves demonstrated the ferromagnetic properties of the ZnO:C nanoneedles. The Curie temperature of the ZnO:C is above 330 K. The ferromagnetic anisotropy with an easy axis perpendicular to the shape axis of the ZnO:C nanoneedles was observed due to the dipole-dipole magnetic interaction amongst nanoneedles.