A comparative study on the magnetic properties of Fe-doped CuO nanopowders prepared by sol-gel and co-precipitation method

摘要

The Fe-doped CuO nanopowders (Cu_(0.95)Fe_(0.05)O) were prepared by the sol-gel and the co-precipitation methods. The effects of synthesis methods on the structure, magnetic property and exchange bias effect of Cu_(0.95)Fe_(0.05)O nanopowders were investigated. The microstructure and magnetic properties of the two types of nanopowders were characterized by X-ray diffraction and physics property measuring systems, respectively. It was found that the sol-gel method tended to lead the formation of CuFe_2O_4 phase, which dominated the magnetic behaviors of the sample; the co-precipitation tended to lead larger exchange bias field at low temperature in samples, comparing with sol-gel method.