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Reduced leakage current, enhanced ferroelectric and dielectric properties of (La, Fe)-codoped Bi0.5Na0.5TiO3-based thin films
Li P.1; Li W.1; Liu S.1; Zhang Y.1; Zhai J.1; Chen H.2
2015
Source PublicationCeramics International
Volume41
IssueS1
PagesS344-S348
AbstractThe lead-free Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3-SrTiO3 (BNT-BKT-ST) and (La, Fe)-codoped Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3-SrTiO3 (BNT-BKT-ST-LaFe) thin films were deposited on Pt/Ti/SiO2/Si substrates by the sol-gel method. Both the BNT-BKT-ST and BNT-BKT-ST-LaFe thin films exhibit pseudo-cubic perovskite structure and uniform grain size. The leakage current density of BNT-BKT-ST-LaFe thin film at 400 kV/cm is reduced by approximately two orders of magnitude compared with BNT-BKT-ST thin film. Enhanced ferroelectric property is achieved in BNT-BKT-ST-LaFe film with a large remanent polarization of 13 μC/cm2. At the same time, the BNT-BKT-ST-LaFe film also exhibits a large dielectric constant of 420 and small dielectric loss of 0.055 at 100 kHz. These results indicate that the (La, Fe)-codoped BNT-BKT-ST thin film is a promising candidate in lead-free ferroelectric materials.
Keyword(La, Fe)-codoped C. Electrical properties Sol-gel method Thin film
DOI10.1016/j.ceramint.2015.03.177
URLView the original
Language英語
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Cited Times [WOS]:15   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionUniversity of Macau
Affiliation1.Tongji University
2.Universidade de Macau
Recommended Citation
GB/T 7714
Li P.,Li W.,Liu S.,et al. Reduced leakage current, enhanced ferroelectric and dielectric properties of (La, Fe)-codoped Bi0.5Na0.5TiO3-based thin films[C],2015:S344-S348.
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