摘要
The diluted magnetic semiconductor Zn1-xMnxO crystals were synthesized at 430 ℃ for 24 h by hydrothermal method. The mineralizer is 3 mol·L-1 KOH, and fill factor is 35%. The Mn concentration in crystal was determined by electron probe. The atomic percentage of Mn in crystal increases as the concentration of MnCl2·6H2O in precursor increases. The maximum of the Mn concentration in crystal is above 8%. The morphology of the crystal varies with the concentration of MnCl2·6H2O in precursor increases. And they all show the hexagonal feature of ZnO wurtzite. The measurement of magnetism was carried out by using a superconducting quantum interference device (SQUID). The crystals show low-temperature ferromagnetism with Curie temperature of 50 K.
基金
Project supported by the National Natural Science Foundation of China (50472037) and Hebei Province of China (E2004000117, F2004000130) and the Science and Technology Research Program and Bureau of Science and Technology of Hebei Province (2002158)
