부산대학교 도서관

The spinel CuNiFeO was synthesized by calcining CuNiFe(CO)⋅5HO above 300 °C in air for 1.5 h. The precursor and its calcined products were characterized by thermogravimetry and differential scanning calorimetry, FT-IR, X-ray powder diffraction, and vibrating sample magnetometer. The result showed that magnetic properties of CuNiFeO were influenced by calcination temperature, and CuNiFeO obtained at 600 °C had a specific saturation magnetization of 40.0 emu g. The thermal process of CuNiFe(CO)⋅5HO below 450 °C experienced two steps which involved, at first, the dehydration of the five crystal water molecules, then decomposition of CuNiFe(CO) into cubic CuNiFeO in air. In the DTG curve, two DTG peaks indicated that precursor experienced mass loss of two steps. [ABSTRACT FROM AUTHOR]