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Domain configurations in relaxor ferroelectric single crystals Pb(Mg1/3Nb2/3)O3–PbTiO3

Published online by Cambridge University Press:  31 January 2011

Guisheng Xu ,
Haosu Luo ,
Zhenyi Qi ,
Haiqing Xu  and
Zhiwen Yin
Guisheng Xu*
Affiliation:
Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Jiading District, Shanghai 201800, People's Republic of China
Haosu Luo
Affiliation:
Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Jiading District, Shanghai 201800, People's Republic of China
Zhenyi Qi
Affiliation:
Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Jiading District, Shanghai 201800, People's Republic of China
Haiqing Xu
Affiliation:
Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Jiading District, Shanghai 201800, People's Republic of China
Zhiwen Yin
Affiliation:
Laboratory of Functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Jiading District, Shanghai 201800, People's Republic of China
*
a)Address correspondence to this author.gshxu@hotmail.com
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Abstract

The 90° macrodomains in tetragonal Pb(Mg1/3Nb2/3)O3–PbTiO3 (PMNT) crystals take the shape of coarse and straight strips under optical microscopes and scanning electron acoustic microscopes. However, 71° or 109° domains in rhombohedral PMNT crystals are relatively poor in contrast and become clearer, coarser and straighter as their composition becomes closer to morphotropic phase boundaries, showing an evolution series of micro-to-macro domain transformation. Moreover, domain configurations are also dependent on the nucleation and growth rate of domains, the crystal defects, and the cooling rate through Curie temperature. The appearance of macrodomains arises from the strengthening of depolarization field and the weakening of random field.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 4 , April 2001 , pp. 932 - 937
Copyright
Copyright © Materials Research Society 2001

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References

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