Impedance spectroscopy study on Mn1+xFe2-2xTixO4 (0≤x≤0.5) ferrites
来源期刊：中南大学学报(英文版)2010年第6期
论文作者：KUMAR S BATOO K M PRAKASH R CHOI H K KOO B H SONG J I CHUNG H JEONG H LEE C G
文章页码：1133 - 1138
Key words：spinel ferrite; magnetic properties; impedance spectroscopy; Ti4+ ions; doping
Abstract: The complex impedance spectroscopy and surface morphology of Mn1+xFe2-2xTixO4 (0≤x≤0.5) system, prepared using a conventional solid state reaction technique, were investigated. The impedance spectroscopy measurements were carried out at room temperature in the frequency range of 42-5 MHz. The electrical processes in the samples were modeled in the form of an equivalent circuit made up of a combination of two parallel RC circuits attributed to grain and grain boundaries. The DC conductivity obtained by extrapolation of AC data using impedance spectroscopy and four-probe method increases at 10% doping of Ti ions. The energy-dispersive X-ray (EDX) pattern confirmed the homogeneous mixing of the Mn, Fe, Ti and O atoms in pure and doped ferrite samples.
