Defects-Induced Room Temperature Ferromagnetism in ZnO Nanorods Grown from 蔚-Zn(OH)2
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- 作者：Jing Wang ; Sichao Hou ; Haoyuan Chen ; Lan Xiang
- 刊名：Journal of Physical Chemistry C
- 出版年：2014
- 出版时间：August 21, 2014
- 年：2014
- 卷：118
- 期：33
- 页码：19469-19476
- 全文大小：473K
- ISSN：1932-7455
文摘
This paper reports the zinc interstitial-induced room temperature ferromagnetism (RT-FM) in undoped ZnO nanorods synthesized by aging 蔚-Zn(OH)2 precursor in 0鈥? mol路L鈥? NaOH at 80 掳C for 10.0 h. The variations of the defect states and ferromagnetism of the ZnO nanorods with NaOH concentration were investigated by X-ray diffraction, Raman scattering, photoluminescence, electron spin resonance, X-ray photoelectron spectroscopy, and superconducting quantum interference device so as to identify the origin of RT-FM. The experimental results revealed that the increase of the NaOH concentration led to the increase of the oxygen-related defects but the decrease of the zinc interstitials in association with the magnetization value. A direct correlation between the ferromagnetism and the relative concentration of the zinc interstitials was established, which indicated that the zinc interstitials may play an important role in mediating the RT-FM in the undoped ZnO nanorods.