Structural, electrical and magnetic properties of cadmium substituted nickel–copper ferrites
- 1 January 2012
- journal article
- Published by Elsevier BV in Materials Chemistry and Physics
- Vol. 132 (1), 138-144
- https://doi.org/10.1016/j.matchemphys.2011.11.009
Abstract
Polycrystalline ferrites with the general formula Ni0.95-xCdxCu0.05Fe2O4 in which x varies from 0.1 to 0.3 were synthesized by standard double sintering ceramic technique. The existence of single phase cubic spinel structure of ferrites was confirmed from XRD measurement. Surface morphology and compositional features were studied by SEM and EDX measurements. Absorption bands observed in FTIR spectra at 600 cm(-1) (nu(1)) and 410 cm(-1) (nu(2)) corresponds to vibrations of tetrahedral and octahedral complexes respectively. In the dc conductivity measurements the decrease of dc resistivity with increase of temperature indicates the semiconducting nature of ferrites. The dielectric measurement of the samples at room temperature studied in the frequency range 20 Hz to 1 MHz shows dispersion in the low frequency region and remains constant at high frequency region. However, the small polaron hoping type of conduction mechanism was inferred from the linear increase of ac conductivity. The magnetic properties of ferrites such as saturation magnetization, magnetic moment and Y-K angles was estimated as a function of cadmium content by VSM technique. The smaller value of Mr/Ms reveals the existence of multidomain (MD) particles in the ferrite samples. (C) 2011 Elsevier B.V. All rights reservedThis publication has 29 references indexed in Scilit:
- Magnetic properties and DC electrical resistivity studies on cadmium substituted nickel–zinc ferrite systemJournal of Magnetism and Magnetic Materials, 2011
- Effect of Cadmium Substitution on Structural and Magnetic Properties of Nano Sized Nickel FerriteChinese Journal of Chemical Physics, 2010
- Effect of zinc substitution on structural and magnetic properties of copper ferriteJournal of Alloys and Compounds, 2010
- Synthesis and characterization of Ni1−xCoxFe2O4 nanoparticlesJournal of Magnetism and Magnetic Materials, 2009
- Effect of cobalt substitution on the properties of nickel–copper ferriteJournal of Physics: Condensed Matter, 2006
- Effect of hopping rate and jump length of hopping electrons on the conductivity and dielectric properties of Co–Cd ferriteJournal of Magnetism and Magnetic Materials, 2001
- Some ac electrical properties of Li–Mg ferritesMaterials Research Bulletin, 1999
- Structure and magnetic properties of Cd and Ti/Si substituted cobalt ferritesMaterials Chemistry and Physics, 1998
- Electric conduction in Ni–Zn ferritesJournal of Magnetism and Magnetic Materials, 1998
- Studies on the electrical properties of polycrystalline cobalt-substituted lithium ferritesJournal of Magnetism and Magnetic Materials, 1996