caa a22 4500 463222636 CHVBK 20180405153217.0 cr unu---uuuuu 170326e20071001xx s 000 0 eng 10.1007/s10853-007-1616-8 doi (NATIONALLICENCE)springer-10.1007/s10853-007-1616-8 Bayoumi Wafaa Chemistry Department, Faculty of Science, Benha University, Benha, Egypt aut Structural and electrical properties of zinc-substituted cobalt ferrite [Elektronische Daten] [Wafaa Bayoumi] Polycrystalline samples of Co1−x Zn x Fe2O4 with stoichiometric proportion (x) varying from 0.0 to 1.0 were prepared through the thermal decomposition of their respective oxalates. The samples were calcined at 1000°C for 3h and characterized using X-ray diffraction (XRD) and Mössbauer spectroscopy techniques. The study of the cation distribution using Mössbauer spectroscopy showed that the ions at the tetrahedral site moved to the octahedral site by the addition of zinc and that the system varied from an inverse to a normal spinel structure. The values of the lattice parameter, X-ray density, oxygen parameter, inversion factor and radii of tetrahedral and octahedral sites were calculated using X-ray diffraction data. The temperature dependence of the conductivity showed a definite kink, except for the ZnFe2O4 sample, which can be attributed to the ferromagnetic-paramagnetic transitions. The calculated activation energy in the paramagnetic region was found to be smaller than that in the ferromagnetic region. Springer Science+Business Media, LLC, 2007 Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/19(2007-10-01), 8254-8261 0022-2461 42:19<8254 2007 42 10853 https://doi.org/10.1007/s10853-007-1616-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10853-007-1616-8 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Bayoumi Wafaa Chemistry Department, Faculty of Science, Benha University, Benha, Egypt aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers-Plenum Publishers; http://www.springer-ny.com 42/19(2007-10-01), 8254-8261 0022-2461 42:19<8254 2007 42 10853 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer