Cobalt doping effects on photoluminescence, Raman scattering, crystal structure, and magnetic and piezoelectric properties in ZnO single crystals grown from molten hydrous LiOH and NaOH solutions

Authors

Lanling Zhao, University of WollongongFollow
Ji-Yang Wang, Shandong Jianzhu University
Xiaolin Wang, University of WollongongFollow
Zhenxiang Cheng, University of WollongongFollow
Jun Wang, University of WollongongFollow
Na Yin, Shandong University
Zhigang Gai, Shandong University, University of Wollongong
A Jalalian, University of Wollongong
S X. Dou, University of WollongongFollow

RIS ID

97776

Publication Details

Zhao, L., Wang, J., Wang, X., Cheng, Z., Wang, J., Yin, N., Gai, Z., Jalalian, A. & Dou, S. (2015). Cobalt doping effects on photoluminescence, Raman scattering, crystal structure, and magnetic and piezoelectric properties in ZnO single crystals grown from molten hydrous LiOH and NaOH solutions. Journal of Alloys and Compounds, 628 303-307. Journal of Alloys and Compounds

Abstract

Transparent, olive-green single-crystal Zn_{1- x}Co_xO in the form of hexagonal lamellae grown from molten hydrous LiOH and NaOH solutions have been studied in terms of crystal structure, optical properties, Raman scattering, and magnetic and piezoelectric properties. Rietveld refinement shows that the lattice parameters and bond lengths decrease with increasing cobalt concentration. Cobalt doping results in slight changes to the piezoelectricity of ZnO, but leads to two new photoluminescence emission peaks at wavelengths of 443 and approx. 510 nm, along with the disappearance of certain Raman active modes. Furthermore, the ferromagnetic state is absent in all Zn_{1- x}Co_xO crystals, and they are all typically paramagnetic instead.

Grant Number

ARC/DP130102956, ARC/FT130100778

Additional Grant Number

http://purl.org/au-research/grants/arc/DP130102956

http://purl.org/au-research/grants/arc/FT130100778