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Aging in the relaxor and ferroelectric state of Fe-doped(1-x)(Bi1/2Na1/2)TiO3-xBaTiO(3) piezoelectric ceramics

Author(s)
Sapper, EvaDittmer, RobertDamjanovic, DraganErdem, EmreKeeble, David J.Jo, WookGranzow, TorstenRoedel, Juergen
Issued Date
2014-09
DOI
10.1063/1.4894630
URI
https://scholarworks.unist.ac.kr/handle/201301/8482
Fulltext
http://scitation.aip.org/content/aip/journal/jap/116/10/10.1063/1.4894630
Citation
JOURNAL OF APPLIED PHYSICS, v.116, no.10, pp.104102
Abstract
Aging of piezoelectric properties was investigated in lead-free (1 - x)(Bi1/2Na1/2)TiO3-xBaTiO(3) doped with 1at.% Fe. The relaxor character of the un-poled material prevents macroscopic aging effects, while in the field-induced ferroelectric phase aging phenomena are similar to those found in lead zirconate titanate or barium titanate. Most prominent aging effects are the development of an internal bias field and the decrease of switchable polarization. These effects are temperature activated, and can be explained in the framework of defect complex reorientation. This picture is further supported by electron paramagnetic resonance spectra indicating the existence of (Fe-Ti'-V-O(center dot center dot))(center dot) defect complexes in the Fe-doped material.
Publisher
AMER INST PHYSICS
ISSN
0021-8979

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