02080nas a2200205   4500008004100000245012200041210006900163260000800232300002700240490000600267520132300273100002201596700002201618700002201640700002601662700002401688700002601712700002401738856011201762       2017                        eng d00aStructural phases, magnetic properties and Maxwell-Wagner type relaxation of CoFe2O4/Sr2Co2Fe12O22 ferrite composites0 aStructural phases magnetic properties and MaxwellWagner type rel  cJUL  aArticle Number: 0761050 v43 aCoFe2O4 (S:Y-1:0) and Sr2Co2Fe12O22 (S:Y-0:1) ferrites were synthesized separately by using chemical coprecipitation technique and calcined at 1000 degrees C for 5 h. The mixed ferrite composites (S:Y-3:7, 4:6, 5:5, 6:4 and 7:3) were prepared by physical mixing of individual ferrite powders in required weight proportions. The prepared composites were heated at 1150 degrees C for 5 h in a muffle furnace and then slowly cooled to room temperature. The prepared ferrites were characterized using various instrumental techniques like FTIR, XRD, SEM, VSM and dielectric measurements. The x-ray diffraction studies of pure Sr2Co2Fe12O22 ferrite sample show the presence of M and Y-type hexagonal phases, while the composites consist of spinel and Y-type phases. FTIR spectra of all samples show two bands of Fe-O stretching vibrations. VSM results of composites reveal that the values of the saturation magnetization (M-s) vary from 50.44 emu g(-1) to 31.21 emu g(-1), while remanent magnetization values found from 11.18 emu g(-1) to 3.70 emu g(-1). A higher value of coercivity (H-c = 562 emu g(-1)) is observed in the composite S:Y-3:7 but Mr/Ms ratio of pure and composites is found to be less than 0.5. The dielectric behavior is explained using Maxwell-Wegner type interfacial polarization and N. Rezlescu's model.1 aPatel, Chirag, K.1 aSolanki, Neha, P.1 aSingh, Charanjeet1 aJotania, Rajshree, B.1 aChauhan, Chetna, C.1 aKulkarni, Shailja, D.1 aShirsath, Sagar, E.  uhttps://library.ncl.res.in/content/structural-phases-magnetic-properties-and-maxwell-wagner-type-relaxation