IMPROVED AND UNUSUAL MAGNETIC PROPERTIES OF ZnO NANORINGS
IMPROVED AND UNUSUAL MAGNETIC PROPERTIES OF ZnO NANORINGS
复制标题
DOI：
10.1142/s1793604713500495
复制
发表时间：
2013-08
影响因子：
1.3
通讯作者：
O. Mondal;Nguyen T. K. Thanh;L. A. Green;M. Pal
中科院分区：
文献类型：
--
作者：
O. Mondal;Nguyen T. K. Thanh;L. A. Green;M. Pal
我们报告了关于在室温下观察到使用十六烷基三甲基溴化铵通过简单的化学路线合成的高纯 ZnO 纳米环中具有高磁矩（高于迄今为止报道的）的异常磁性行为的新结果。磁化强度的增强归因于与纳米环较大的表面积与体积比所产生的缺陷相关的大量表面自旋。本研究表明，即使不掺杂过渡金属，仅通过调整纳米结构即可使 ZnO 样品具有高磁性。已经观察到一些新的磁性特征，这里描述了可能的解释。
We report the novel result regarding the observation of unusual magnetic behavior with high magnetic moment (higher than reported so far) at room temperature in highly pure ZnO nanorings synthesized by a simple chemical route using cetyltrimethyl ammonium bromide. The enhanced magnetization is attributed to the huge number of surface spins associated with defects created due to the larger surface to volume ratio of nanorings. The present study demonstrates that ZnO samples can be made highly magnetic just by tailoring the nanostructure even without doping transition-metal. Some new magnetic features have been observed and possible explanations are delineated here.