01618nas a2200193   4500008004100000022001400041245017500055210006900230260008000299300001400379490000700393520078000400100001901180700002101199700001901220700002501239700003301264856012701297       2007                        eng d  a0022-372700aFinite size effects on the electrical properties of sol-gel synthesized CoFe2O4 powders: deviation from Maxwell-Wagner theory and evidence of surface polarization effects0 aFinite size effects on the electrical properties of solgel synth  aDIRAC HOUSE, TEMPLE BACK, BRISTOL BS1 6BE, ENGLANDbIOP PUBLISHING LTDcMAR  a1593-16020 v403 a<p>Fine particles of cobalt ferrite were synthesized by the sol-gel method. Subsequent heat treatment at different temperatures yielded cobalt ferrites having different grain sizes. X-ray diffraction studies were carried out to elucidate the structure of all the samples. Dielectric permittivity and ac conductivity of all the samples were evaluated as a function of frequency, temperature and grain size. The variation of permittivity and ac conductivity with frequency reveals that the dispersion is due to Maxwell-Wagner type interfacial polarization in general, with a noted variation from the expected behaviour for the cold synthesized samples. High permittivity and conductivity for small grains were explained on the basis of the correlated barrier-hopping model.</p>1 aGeorge, Mathew1 aNair, Swapna, S.1 aMalini, K., A.1 aJoy, Pattayil, Alias1 aAnantharaman, Maliemadom, R.  uhttps://library.ncl.res.in/content/finite-size-effects-electrical-properties-sol-gel-synthesized-cofe2o4-powders-deviation