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Stabilized antiferroelectric phase in lanthanum-doped (Na <inf>1/2</inf>Bi<inf>1/2</inf>)TiO<inf>3</inf>

Yi, JY and Lee, JK (2011) Stabilized antiferroelectric phase in lanthanum-doped (Na <inf>1/2</inf>Bi<inf>1/2</inf>)TiO<inf>3</inf>. Journal of Physics D: Applied Physics, 44 (41). ISSN 0022-3727

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Phase transition behaviour of La-modified sodium bismuth titanate ceramics [(Na0.5Bi0.5)1-1.5xV0.5xLa x]TiO3 (NBLT) was investigated. The two anomalies in εr(T) and DSC analysis indicated that lower temperature phase transitions below 200 °C became pronounced with La additions. The polarization relaxation of εr(T) and double hysteresis loops showed that the intermediate region between two dielectric anomalies was the antiferroelectric modulated phase. The origin of the modulated antiferroelectric state was discussed in terms of disordering effects of the La ions and cation vacancies. With increasing La content, the long-range symmetry of the dipoles in the ferroelectric phase was disturbed in the intermediate region. The competition between rhombohedral ferroelectric phase and tetragonal paraelectric phase contributed to the formation of a modulated antiferroelectric phase in NBLT ceramics. © 2011 IOP Publishing Ltd.


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Item Type: Article
Status: Published
CreatorsEmailPitt UsernameORCID
Yi, JY
Lee, JKjul37@pitt.eduJUL370000-0002-7778-7679
Centers: Other Centers, Institutes, Offices, or Units > Petersen Institute of NanoScience and Engineering
Date: 5 October 2011
Date Type: Publication
Journal or Publication Title: Journal of Physics D: Applied Physics
Volume: 44
Number: 41
DOI or Unique Handle: 10.1088/0022-3727/44/41/415302
Schools and Programs: Swanson School of Engineering > Mechanical Engineering and Materials Science
Refereed: Yes
ISSN: 0022-3727
Date Deposited: 23 Oct 2014 16:20
Last Modified: 22 Jun 2021 19:55


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