Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/4115
Title: Effect of La3+ content on the properties of ferroelectric Bi4-xLaxTi3O12 (BLT) thin films prepared by aqueous chemical solution deposition
Authors: HARDY, An 
VAN BAEL, Marlies 
VAN DEN RUL, Heidi 
VANGENECHTEN, Dirk
MULLENS, Jules 
D'HAEN, Jan 
Goux, L
Wouters, D.J.
Issue Date: 2007
Publisher: SPRINGER
Source: JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 42(3). p. 239-245
Abstract: Lanthanum substituted bismuth titanate thin films were deposited using an aqueous chemical solution deposition method. Varying the composition of Bi4-xLaxTi3O12, with x = 0.5, 0.65, 0.75 and 0.85, is shown to have a large influence on the microstructure and properties of the films. Increasing the amount of La3+, x, from 0.5 to 0.85 led to a decrease of the remanent polarization (P-r) from 6.2 to eventually 0 mu C/cm(2). This decrease of P-r is explained by means of X-ray diffraction (XRD) study, which shows that there is an increased preference for c-axis orientation upon increasing the La3+ concentration. Furthermore, a strong decrease of the grain size upon increasing x is observed in a scanning electron microscopic (SEM) study. The concurrent increase of domain pinning on the grain boundaries is a second effect which may be responsible for the deterioration of the ferroelectric property at larger x.
Notes: Hasselt Univ, Inst Mat Res, Lab Inorgan & Phys Chem, B-3590 Diepenbeek, Belgium. IMEC VZW, Div IMOMEC, B-3590 Diepenbeek, Belgium. IMEC VZW, B-3001 Louvain, Belgium.HARDY, A, Hasselt Univ, Inst Mat Res, Lab Inorgan & Phys Chem, Agoralaan Bldg D, B-3590 Diepenbeek, Belgium.an.hardy@uhasselt.be jules.mullens@uhasselt.be
Keywords: aqueous solution-gel precursor; chemical solution deposition; ferroelectric; BLT; XRD; SEM; X-TEM
Document URI: http://hdl.handle.net/1942/4115
ISSN: 0928-0707
e-ISSN: 1573-4846
DOI: 10.1007/s10971-007-0742-2
ISI #: 000245899500007
Category: A1
Type: Journal Contribution
Validations: ecoom 2008
Appears in Collections:Research publications

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