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Fabrication and Study on Magnetic-Optical Properties of Ni-Doped ZnO Nanorod Arrays

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School of Information Science Technology, Northwest University, Xi’an 710127, China
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School of Physics and Electronic Information, Yan’an University, Yan’an 716000, China
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Communication and Information Engineering College, Xi’an University of Science and Technology, Xi’an 710127, China
*
Authors to whom correspondence should be addressed.
Micromachines 2019, 10(9), 622; https://doi.org/10.3390/mi10090622
Received: 8 August 2019 / Revised: 10 September 2019 / Accepted: 15 September 2019 / Published: 18 September 2019
Zn1-xNixO nanorod arrays were prepared on Si substrates by magnetron sputtering and hydrothermal methods at 100 °C. We studied the effects of doped concentration and hydrothermal growth conditions on the crystal structure, morphology, photoluminescence, and magnetic properties of Zn1-xNixO nanorod arrays. The research results show that the Zn1-xNixO nanorod have the hexagonal wurtzite structure without the appearance of the second phase, and all samples have a highly preferred orientation of a (002) crystal face. The Zn1-xNixO nanorod arrays exhibit obvious room temperature ferromagnetism with saturation magnetization at 4.2 × 10−4 emu/g, the residual magnetization is 1.3 × 10−4 emu/g and the coercive field is 502 Oe, and also excellent luminescent properties with seven times greater luminous intensity than that of ZnO nanorod arrays. The redshift of the ultraviolet emission peak was found by Ni2+ doping. We further explained the source and essence of the magnetic properties of Zn1-xNixO nanorod arrays and deemed that the magnetic moment mainly comes from the hybrid electron exchange of O 2p and Ni 3d state. View Full-Text
Keywords: magnetron sputtering; hydrothermal method; Ni2+-doped; ZnO nanorod arrays; magnetic-hysteresis curves magnetron sputtering; hydrothermal method; Ni2+-doped; ZnO nanorod arrays; magnetic-hysteresis curves
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MDPI and ACS Style

Wang, W.; Hui, S.; Zhang, F.; Wang, X.; Zhang, S.; Yan, J.; Zhang, W. Fabrication and Study on Magnetic-Optical Properties of Ni-Doped ZnO Nanorod Arrays. Micromachines 2019, 10, 622.

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