Growth and properties of spinel structure ZnCoTiO single crystals by the optical floating zone method.

The spinel structure ZnCoTiO single crystals with 5 mm diameter and 30 mm length were successfully grown by an optical floating zone method. The as-grown crystals were characterized by X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopy (XPS). Some Zn ions at tetrahedral and octahedral sites should be replaced by doped transition metal Co ions. The temperature-dependent Raman spectra of spinel ZnCoTiO crystals were also described. The optical phonon behaviors of ZnCoTiO are stable within the temperature range. The magnetic properties of ZnCoTiO were investigated by using Physical Property Measurement System.