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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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

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Title
Aging in the relaxor and ferroelectric state of Fe-doped(1-x)(Bi1/2Na1/2)TiO3-xBaTiO(3) piezoelectric ceramics
Author
Sapper, EvaDittmer, RobertDamjanovic, DraganErdem, EmreKeeble, David J.Jo, WookGranzow, TorstenRoedel, Juergen
Issue Date
2014-09
Publisher
AMER INST PHYSICS
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/8482
URL
http://scitation.aip.org/content/aip/journal/jap/116/10/10.1063/1.4894630
DOI
10.1063/1.4894630
ISSN
0021-8979
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