caa a22 4500 44538204X CHVBK 20180317143020.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-0956-9 doi (NATIONALLICENCE)springer-10.1007/s10948-010-0956-9 Structural and Electrical Properties of Ni-Co Nanoferrites Prepared by Co-precipitation Route [Elektronische Daten] [Asghari Maqsood, Kishwar Khan, M. Anis-ur-Rehman, Muhammad Ali Malik] A series of Ni1−x CoxFe2O4 (x=0.1, 0.2, 0.3, 0.4, 0.5) spinel ferrites have been synthesized successfully using the chemical co-precipitation route. The materials were characterized by X-rays powder diffractometry (XRD) and the electrical properties. The obtained crystallite size variation was within 15 to 33nm using the Scherrer formula. The dc electrical resistivity was measured as a function of temperature. It is noticed that σ dc increases with a rise in temperature. The dielectric measurements were carried out at room temperature as a function of frequency and composition (x). The dielectric constant (ε′) and dielectric loss tangent (tan δ) showed a decreasing trend with increasing field frequency. The ac electrical conductivity is calculated from the dielectric measurements; it increases with the rise in frequency. Springer Science+Business Media, LLC, 2010 DC electrical conductivity nationallicence Nanoferrites nationallicence Porosity nationallicence Maqsood Asghari Thermal Transport Laboratory, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), 45320, Islamabad, Pakistan aut Khan Kishwar Thermal Transport Laboratory, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), 45320, Islamabad, Pakistan aut Anis-ur-Rehman M. Applied Thermal Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, 44000, Islamabad, Pakistan aut Ali Malik Muhammad Applied Thermal Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, 44000, Islamabad, Pakistan aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 617-622 1557-1939 24:1-2<617 2011 24 10948 https://doi.org/10.1007/s10948-010-0956-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0956-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maqsood Asghari Thermal Transport Laboratory, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), 45320, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Khan Kishwar Thermal Transport Laboratory, School of Chemical and Materials Engineering (SCME), National University of Sciences and Technology (NUST), 45320, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Anis-ur-Rehman M. Applied Thermal Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, 44000, Islamabad, Pakistan aut NATIONALLICENCE 700 1- Ali Malik Muhammad Applied Thermal Physics Laboratory, Department of Physics, COMSATS Institute of Information Technology, 44000, Islamabad, Pakistan aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 617-622 1557-1939 24:1-2<617 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer