Origination of electron magnetic chiral dichroism in cobalt-doped ZnO dilute magnetic semiconductors

被引：11
作者：
Zhang, Z. H. [1 ,3 ]
Tao, H. L. [1 ]
He, Ming [2 ]
Li, Quan [3 ]
机构：
[1] Dalian Jiaotong Univ, Sch Mat Sci & Engn, Liaoning Key Mat Lab Railway, Dalian 116028, Peoples R China
[2] Dalian Jiaotong Univ, Dept Phys, Dalian 116028, Peoples R China
[3] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
来源：
SCRIPTA MATERIALIA | 2011年 / 65卷 / 04期
基金：
中国国家自然科学基金;
关键词：
Electron energy loss spectroscopy (EELS); First-principles electron theory; Semiconductor compounds; Nanostructure; FERROMAGNETISM; TEMPERATURE;
D O I：
10.1016/j.scriptamat.2011.05.013
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Electron magnetic chiral dichroism (EMCD) relates the microstructure of a single nanostructure with the magnetic property, indicating that the ferromagnetism observed in cobalt-doped ZnO dilute magnetic semiconductor is intrinsic. First-principles calculations were carried out and the electronic states contributing to the spin imbalance are identified. An exact model is developed, allowing one to visualize the origination of dichroism to be the difference of transition intensity from spin-polarized 2p states to Co-3d states in cobalt-doped ZnO nanostructures. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：367 / 370
页数：4
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