Regulation of Magnetic Behavior and Electronic Configuration in Mn-Doped ZnO Nanorods through Surface Modifications
Regulation of Magnetic Behavior and Electronic Configuration in Mn-Doped ZnO Nanorods through Surface Modifications
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通过表面修饰调控锰掺杂 ZnO 纳米棒的磁行为和电子构型
DOI：
10.1021/cm203661c
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发表时间：
2012-04
影响因子：
8.6
通讯作者：
Yan, Wensheng
中科院分区：
文献类型：
--
作者：
Wu, Ziyu;Wang, Jian-Qiang;Li, Jiong;Zhang, Shuo;Jiang, Zheng;Zhou, Jing;Cheng, Jie;Hu, Ti;ou;Yan, Wensheng
在这项研究中，Mn掺杂的ZnO纳米棒的合成通过溶剂热法和它们的磁性行为从顺磁性调整到铁磁性通过改变它们的表面环境。利用X射线衍射和X射线吸收精细结构研究了Mn离子的结构和电子构型，以了解表面控制的磁性。用Mn L-3，L-2-edge XANES研究了表面的电子结构，并用配体场多重态理论和配体-金属电荷转移效应模拟了表面的电子结构。结果表明，Mn ~（3+）离子占据了靠近表面区域的畸变四面体位置，不同的表面改性导致了Mn ~（3+）离子3d-p杂化强度的变化。在O K边XANES中还发现了一个具有强O-2 p特征的中间带隙态，这种态的密度与所观察到的铁磁性密切相关。这项研究为通过表面原子变化调节纳米稀磁半导体系统的磁行为提供了一条新的有前途的途径。
In this research, Mn-doped ZnO nanorods were synthesized by a solvothermal method and their magnetic behavior was tuned from paramagnetism to ferromagnetism via a change in their surface environment. The structure and electronic configuration of Mn ions were investigated by means of X-ray diffraction and X-ray absorption fine structure to understand the surface-controlled magnetic properties. The surface electronic configuration was studied by Mn L-3,L-2-edge XANES, which were simulated using the ligand field multiplet theory and the ligand-to-metal charge transfer effects. The results pointed out that Mn3+ ions occupy distorted tetrahedronal sites near the surface region and different surface modifications produce changes in the Mn 3d-anion p hybridization strength. A midgap state with strong O-2p character has been also recognized at the O K-edge XANES, and the density of such a state is strongly related to the observed ferromagnetism. This research represents a novel promising route for tuning the magnetic behavior of nano-dilute magnetic semiconductor systems via surface atomic changes.
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影响因子：
2.1
作者：
Dalpian, Gustavo M.;Wei, Su-Huai;Fazzio, A.
通讯作者：
Fazzio, A.
影响因子：
2.1
作者：
Jinghai Yang;L. Y. Zhao;Yongjun Zhang;Yaxin Wang;Huilian Liu;M. Wei
通讯作者：
Jinghai Yang;L. Y. Zhao;Yongjun Zhang;Yaxin Wang;Huilian Liu;M. Wei
影响因子：
8.6
作者：
Hamad, KS;Roth, R;Alivisatos, AP
通讯作者：
Alivisatos, AP
影响因子：
4
作者：
Wang, J. B.;Huang, G. J.;Liu, E. H.
通讯作者：
Liu, E. H.
钴和锰掺杂 ZnO 表面的表面态诱导铁磁性
影响因子：
3.7
作者：
Du, Xiwen;Zhao, Naiqin;Shi, Chunsheng;Li, Jiajun;Liu, Enzuo
通讯作者：
Liu, Enzuo