Ferroelectric and piezoelectric properties of lead-free Bi0.5Na0.5 TiO3-Bi0.5K0.5TiO3-BaTiO3-thin films near the morphotropic phase boundary
- Authors
- Acharya, Susant Kumar; Kim, Tae-Min; Hyung, Jung-Hwan; Ahn, Byung-Guk; Lee, Sang-Kwon
- Issue Date
- Feb-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- BNT-BT thin film; Piezoelectric; Ferroelectric; Morphotropic; Phase boundary; Perovskite structure
- Citation
- JOURNAL OF ALLOYS AND COMPOUNDS, v.586, pp 549 - 554
- Pages
- 6
- Journal Title
- JOURNAL OF ALLOYS AND COMPOUNDS
- Volume
- 586
- Start Page
- 549
- End Page
- 554
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/12478
- DOI
- 10.1016/j.jallcom.2013.10.028
- ISSN
- 0925-8388
1873-4669
- Abstract
- Lead-free Bi0.5Na0.5TiO3 (BNT)-Bi0.5K0.5TiO3 (BKT)-BaTiO3 (BT) piezoelectric thin films with compositions near the morphotropic phase boundary (MPB) were deposited by metal-organic solution deposition on Pt/Ti/SiO2/Si (100) substrates. The compositional dependences of their microstructure and ferroelectric/piezoelectric properties were investigated. The results indicated that all the thin films have a single-phase perovskite structure and show outstanding electrical properties at room temperature. We found that the thin film with a composition of 0.884BNT-0.08BKT-0.036BT showed the best structural and electrical properties, with a dielectric constant, remnant polarization, and effective piezoelectric constant of similar to 638, similar to 27 mu C/cm(2) and similar to 79 pC/N, respectively. We suggest that these superior properties are due to this sample's high degree of alignment of ferroelectric domains in the MPB region and largest grain size. (C) 2013 Elsevier B. V. All rights reserved.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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