Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28430
Title: Compositionally graded Ba1-xSrxTiO3 ferroelectric thin films layer-by-layer deposited by pulsed laser abalation
Authors: Zhu, XH
Lu, SG
Choy, CL
Chan, HLW 
Wong, KH
Keywords: (Ba1-xSrx)TiO3
Compositionally graded films
Preferred orientation
Dielectric properties
Issue Date: 2001
Publisher: Taylor & Francis Ltd
Source: Integrated ferroelectrics, 2001, v. 36, no. 1-4, p. 73-82 How to cite?
Journal: Integrated Ferroelectrics 
Abstract: Compositionally graded (Ba1-xSrx)TiO3 (BST) ( x: 0.0similar to 0.25) thin films were layer-by-layer grown on Pt(111)/Ti/SiO2/Si(100) substrates by pulsed laser ablation at oxygen pressures between 50 similar to 400 mTorr. The influence of ambient gas pressure on the film preferred orientation and dielectric properties of graded films were systematically investigated. For up-graded films with Ba/Sr ratios varying from 75/25 at the substrate to 100/0 at the top surface, the preferred orientation evolved in the sequences of (100)+(110) -->(110)+(111)-->(100) as increasing the ambient gas pressure, whereas for the down-graded films with Ba/Sr ratios varying from 100/0 at the substrate to 75/25 at the top surface, the preferred orientation varied in the order of (100)+(110)-->(100). The related driving force for orientation evolution was presumably changed from minimization of surface energy to minimization of energy loss per unit area as increasing ambient gas pressure. An enhanced dielectric behavior was observed in the down-graded films, which may be mainly attributed to the large strain fields built in the down-graded films and at the down-graded film/substrate interface.
Description: 13th International Symposium on Integrated Ferroelectrics, Colorado Springs, Colorado, 11-14 March 2001
URI: http://hdl.handle.net/10397/28430
ISSN: 1058-4587
DOI: 10.1080/10584580108015529
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

WEB OF SCIENCETM
Citations

5
Last Week
0
Last month
0
Citations as of Jul 15, 2017

Page view(s)

30
Last Week
0
Last month
Checked on Jul 16, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.