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Conventional and Microcontact Impedance Studies of Mn–Zn Ferrite Ceramics

Published online by Cambridge University Press:  03 March 2011

Jong-Sook Lee ,
Jürgen Fleig ,
Joachim Maier  and
Doh-Yeon Kim
Jong-Sook Lee
Affiliation:
Max Planck Institut für Festkörperforschung, D-70569 Stuttgart, Germany
Jürgen Fleig
Affiliation:
Max Planck Institut für Festkörperforschung, D-70569 Stuttgart, Germany
Joachim Maier
Affiliation:
Max Planck Institut für Festkörperforschung, D-70569 Stuttgart, Germany
Doh-Yeon Kim
Affiliation:
Center for Microstructure Science of Materials and School of Materials Science and Engineering, Seoul National University, Seoul 151-742, Korea
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Abstract

Microcontact impedance spectroscopy in conjunction with conventional impedance techniques has been performed to elucidate microstructural and compositional inhomogeneities in polycrystalline Mn–Zn ferrites. Microcontact studies reveal the occurrence of oxygen stoichiometry gradients in these typically prepared ferrite ceramics together with a strong spatial resistance variation from boundary to boundary. This leads to a reinterpretation of the conventional impedance spectra of ferrites.

Keywords

CeramicElectrical propertiesGrain boundaries
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 3 , March 2004 , pp. 864 - 871
Copyright
Copyright © Materials Research Society 2004

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