Optical and ferromagnetic properties of Cr doped ZnO nanorods

被引：9
作者：
Lin, Bao-Zhu [1 ,2 ]
Zhou, Lin [1 ,2 ]
Yuldashev, Sh. U. [2 ]
Fu, De-Jun [1 ]
Kang, Tae-Won [2 ]
机构：
[1] Wuhan Univ, Sch Phys & Technol, Minist Educ, Key Lab Artificial Micro & Nanomat, Wuhan 430072, Peoples R China
[2] Dongguk Univ, Quantum Funct Semicond Res Ctr, Seoul 100715, South Korea
来源：
APPLIED SURFACE SCIENCE | 2014年 / 315卷
基金：
中国国家自然科学基金;
关键词：
Magnetism; Semiconductors; ZnO; Photoluminescence; GROWTH; ARRAYS; ZINC; TRANSITION;
D O I：
10.1016/j.apsusc.2014.07.006
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
ZnO nanorods doped with 1-2 wt% Cr were grown on Si substrates by hydrothermal method. Scanning electron spectroscopy and X-ray diffraction show the hexagonal structure of the nanorods with ZnO oriented along (1 0 0), (0 0 2), (1 0 1) and (1 0 2) and CrO2 along (2 1 1). Ionized donor bound exciton, neutral donor bound exciton, free exciton, two-electron-satellite of hydrogen donor bound exciton, and donor acceptor pairs were observed in low temperature photoluminescence spectra. The photoluminescence spectra along with XPS results confirm that Zn, was formed in the low temperature hydrothermal process. Superconducting quantum interference device measurement reveals that the Cr-doped ZnO nanorods are ferromagnetic with saturation magnetization of 2.421 x 10(-3) emu/g. The room temperature ferromagnetic properties are explained by defect-mediated bound magnetic polarons based on Zn-i. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：124 / 130
页数：7
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