Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/99145
Title: Size dependence of defect-induced room temperature ferromagnetism in undoped ZnO nanoparticles
Authors: Xu, Xiaoyong
Xu, Chunxiang
Dai, Jun
Hu, Jingguo
Li, Fengji
Zhang, Sam
Keywords: DRNTU::Science::Chemistry::Physical chemistry
Issue Date: 2012
Source: Xu, X., Xu, C., Dai, J., Hu, J., Li, F., & Zhang, S. (2012). Size dependence of defect-induced room temperature ferromagnetism in undoped ZnO nanoparticles. The Journal of Physical Chemistry C, 116(15), 8813-8818.
Series/Report no.: The journal of physical chemistry C
Abstract: We report the intrinsic room-temperature ferromagnetism in undoped ZnO nanoparticles with different sizes synthesized by a wet chemical method at different temperatures. Electron paramagnetic resonance, X-ray photoelectron spectroscopy, and photoluminescence measurements demonstrate clearly the singly charged oxygen vacancies are the main defects, and the relative occupancy of that decreases with increasing sizes and annealing temperatures. Importantly, a direct correlation between the ferromagnetism and the relative concentration of the singly charged oxygen vacancies is established, which suggests that the singly charged oxygen vacancies play a crucial role in modulating ferromagnetic behaviors. Moreover, the size-dependent ferromagnetism can be manipulated conveniently by changing of the surface–volume ratio, which is in favor of future electronic and spintronic application.
URI: https://hdl.handle.net/10356/99145
http://hdl.handle.net/10220/17226
DOI: 10.1021/jp3014749
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:MAE Journal Articles

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