Synthesis of CuMn_2O_4 Spinel and Its Magnetic Properties Characterization

摘要

Cooper manganite (CuMn_2O_4) has been widely known as a material that has unique magnetic properties because it depend on the synthesize method. In this paper, a promising method has been developed to synthesize the CuMn2O4 spinel using high purity Cu and Mn powders. The mixing of Cu and Mn powders was carried out through wet milling technique with Cu and Mn atomic ratio (%) of 1:2. The powder was then calcinated in order to form the CuMn2O4 spinel. The formation of oxide spinel was studied at temperature of 700, 800, 900 and 1000°C for 18 h, separately. The phase formation and magnetic properties of the samples were characterized by x-ray diffraction (XRD) and vibrating sample magnetometer (VSM), respectively. According to the XRD patterns, the single crystal phase of spinel can be obtained for calcination at 800°C and 900°C. However,at 1000°C, the spinel decomposed into MnO and CuO compounds. Meanwhile, the magnetic properties of samples are depend on the calcination temperature. The results of magnetic characterization are discussed in this paper.