caa a22 4500 445382112 CHVBK 20180317143020.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-0931-5 doi (NATIONALLICENCE)springer-10.1007/s10948-010-0931-5 Mössbauer and Electrical Studies of Mn x Co1− x Fe2O4 Compounds Prepared via Glycothermal Route [Elektronische Daten] [H. Abdallah, T. Moyo, J. Msomi] Manganese-cobalt ferrite powders (MnxCo1−x Fe2O4 with x varying from 0.0 to0.6) have been produced by glycothermal process from pure metal chlorides. Single phase cubic spinel structure and nanophase structure of the as-synthesized samples were confirmed by X-ray diffraction (XRD) and by transmission electron microscope (TEM). The results show that the produced powders have grain sizes in the range 7 to 13nm. Fe-57 Mössbauer spectra for as-synthesized and for annealed samples at 700 °C (in Ar atmosphere for 1hour) are found to be similar. No significant changes in the spectra are observed across the composition range studied. The variations of grain sizes, lattice parameters, and Mössbauer parameters as a function of composition have also been investigated. Bulk samples in the form of pellets were also produced from the as-synthesized compounds for resistivity measurements. The temperature dependence of the electrical resistivity for the samples sintered at 1050 °C were studied using the four-probe method, from room temperature to about 110 °C in a PID controlled oven. Two possible mechanisms for resistivity involving T −1/2 and T −1 dependences are investigated. Springer Science+Business Media, LLC, 2010 Glycothermal nationallicence Nanoparticles nationallicence Mössbauer spectroscopy nationallicence Resistivity nationallicence Ferrites nationallicence Abdallah H. School of Physics, University of KwaZulu-Natal, 4000, Durban, South Africa aut Moyo T. School of Physics, University of KwaZulu-Natal, 4000, Durban, South Africa aut Msomi J. Department of Physics, University of Free State, P/Bag X13, 9866, Phuthaditjhaba, South Africa aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 669-673 1557-1939 24:1-2<669 2011 24 10948 https://doi.org/10.1007/s10948-010-0931-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0931-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Abdallah H. School of Physics, University of KwaZulu-Natal, 4000, Durban, South Africa aut NATIONALLICENCE 700 1- Moyo T. School of Physics, University of KwaZulu-Natal, 4000, Durban, South Africa aut NATIONALLICENCE 700 1- Msomi J. Department of Physics, University of Free State, P/Bag X13, 9866, Phuthaditjhaba, South Africa aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 669-673 1557-1939 24:1-2<669 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer