Structural, Transport and Magnetic Properties of Li-Mg Ferrites

抄録

  Mixed ferrospinel with a general formula Li_xM_xMg_(1−2x)Fe₂O₄(for M=Cr,Mn,Fe,Co for x=0,.25 and 5) are prepared by ceramic technique. Formation is checked by XRD and all compounds are cubic spinels even in presence of J-Tions with lattice dimensions ranging from 8.30 to 8.37A. Charge and site distribution is obtained from diffraction data supported by electrical and magnetic parameters. The compounds are semiconducting with energy of activation ranging from 0.25 to 0.63ev. The observed magnetic results(Guoy and n-d) are explained by Neel's model or by Yafet-Kittel model.