title: On the dielectric dispersion and absorption in nanosized manganese zinc mixed ferrites.
abstract: The temperature and frequency dependence of dielectric permittivity and dielectric loss of nanosized Mn(1-x)Zn(x)Fe(2)O(4) (for x = 0, 0.2, 0.4, 0.6, 0.8, 1) were investigated. The impact of zinc substitution on the dielectric properties of the mixed ferrite is elucidated. Strong dielectric dispersion and broad relaxation were exhibited by Mn(1-x)Zn(x)Fe(2)O(4). The variation of dielectric relaxation time with temperature suggests the involvement of multiple relaxation processes. Cole-Cole plots were employed as an effective tool for studying the observed phenomenon. The activation energies were calculated from relaxation peaks and Cole-Cole plots and found to be consistent with each other and indicative of a polaron conduction.
authors.affiliation: Department of Physics, Cochin University of Science and Technology, Cochin-682 022, Kerala, India.
authors.forename: E
authors.initials: E
authors.lastname: Veena Gopalan
authors.forename: K A
authors.initials: KA
authors.lastname: Malini
authors.forename: D
authors.initials: D
authors.lastname: Sakthi Kumar
authors.forename: Yasuhiko
authors.initials: Y
authors.lastname: Yoshida
authors.forename: I A
authors.initials: IA
authors.lastname: Al-Omari
authors.forename: S
authors.initials: S
authors.lastname: Saravanan
authors.forename: M R
authors.initials: MR
authors.lastname: Anantharaman