Analogous study in low magnetic field between Cu-Ge and Cu-Si ferrites

Two series of mixed copper ferrites, Cu1+x Gex Fe2−2x O4 and Cu1+x Six Fe2−2x O4, have been analogously investigated for x=0.0, 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3. The two systems were prepared using the standard ceramic techniques. X-ray diffraction analysis indicates that both systems formed in a single phase cubic spinel structure. The lattice parameter has a constant value (0.838 nm±0.001) for the two series. The grain diameter was estimated from the scanning electron microscope micrographs for the two series. Some magnetic properties were measured at room temperature. The magnetization M was measured in the range of magnetizing field up to 5500 Am−1. The relative permeability (μr) was calculated from the B-H relation. The B-H loops were measured at constant magnetizing current (I=2.5 A which is equivalent to 900 Am−1). Also, the hystersis area and the magnetic parameters Br, Bs, mR (Br/Bs) and apparent energy loss (E) were estimated from the B-H loops; μr, Br, Bs and E are composition dependent.