Growth and properties of spinel structure Zn1.8Co0.2TiO4 single crystals by the optical floating zone method

Abstract

The spinel structure Zn_1.8Co_0.2TiO₄ 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 Zn²⁺ ions at tetrahedral and octahedral sites should be replaced by doped transition metal Co²⁺ ions. The temperature-dependent Raman spectra of spinel Zn_1.8Co_0.2TiO₄ crystals were also described. The optical phonon behaviors of Zn_1.8Co_0.2TiO₄ are stable within the temperature range. The magnetic properties of Zn_1.8Co_0.2TiO₄ were investigated by using Physical Property Measurement System.