From
Fig. 4(b), it will be also noted that the (002) peak of 850 C sample
show asymmetry. But this peak can not be decomposed into the
two or more different peaks by Gauss fitting, so, the asymmetry
should not be caused by the secondary phase formation. We
attempt to explain that the asymmetry of (002) peak may be
induced by a large number of Zn1xMgxO nanowires with the small