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Nonlinear Dielectric and Piezoelectric Responses in (Bi, La)FeO3-Pb(Ti, Mn)O3 Ceramics

Published online by Cambridge University Press:  30 March 2012

Guiyang Shi ,
Shundong Bu ,
Rui Dai ,
Shengwen Yu  and
Jinrong Cheng
Guiyang Shi
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072
Shundong Bu
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072
Rui Dai
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072
Shengwen Yu
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072
Jinrong Cheng
Affiliation:
School of Materials Science and Engineering, Shanghai University, Shanghai, 200072
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Abstract

Polycrystalline solutions of 0.6(Bi0.9La0.1)FeO3-0.4Pb(Ti1-xMnx)O3(BLF-PTM, x=0 and 0.01)have been fabricated by the so-gel process combined with a solid state reaction method. BLF-PTM exhibits the nonlinear dielectric and piezoelectric responses under applied fields. Rayleigh law has been used to evaluate the irreversible contribution of the domain walls movement to the nonlinear dielectric response. Rayleigh analysis reveals that a mechanism with no associated loss exists in the BLF-PTM of x=0.01. The real part piezoelectric coefficient of BLF-PTM linearly increases with increasing the electric fields. The dielectric and piezoelectric nonlinear coefficient of 0.17×10-3 m/V and 0.897 ×10-17 m2/V2 respectively are obtained for BLF-PTM of x=0.01,which are smaller than those of 0.22×10-3 m/V and 1.19 ×10-17 m2/V2 for BLF-PTM of x=0. Our results indicate that Mn doping increase the intrinsic piezoelectric properties of BLF-PTM reducing the extrinsic contributions to piezoelectric responses.

Keywords

dielectric propertiespiezoelectricpiezoresponse
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1397: Symposium P – Ferroelectric and Multiferroic Materials , 2012 , mrsf11-1397-p09-10
Copyright
Copyright © Materials Research Society 2012

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References

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