Enhanced fatigue and ferroelectric properties in multiferroic (Ba 0.7Sr0.3)TiO3/(Bi1.05La 0.05)FeO3 epitaxial heterostructures

Chew, K.H. and Jiang, Y. and Miao, J. and Xu, X.G. and Zhang, J.X. and Zhan, Q. (2013) Enhanced fatigue and ferroelectric properties in multiferroic (Ba 0.7Sr0.3)TiO3/(Bi1.05La 0.05)FeO3 epitaxial heterostructures. Applied Physics Letters, 102 (23). ISSN 00036951

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Abstract

Fatigue and ferroelectric properties of multiferroic (Ba 0.7Sr0.3)TiO3/(Bi1.05La 0.05)FeO3 (BST/BLF) epitaxial heterostructures are studied and compared to those of BLF single-layer films. Our studies show that oxygen vacancies V O • • are the most likely mobile defects in bilayers, whereas defect dipole complexes (F e F e 3 + ′ - V O • •) dominate the single-layer film. However, the fatigue mechanism in both structures is mainly governed by the migration of V O • •. The presence of BST layer in the bilayer increases the energy barrier for the migration of V O • • and decreases the concentration of V O • •. The BST/BLF bilayer reveals an improved fatigue and ferroelectric properties, suggesting a step towards realizing nonvolatile memory applications. © 2013 AIP Publishing LLC.

Item Type: Article
Additional Information: Department of Physics, Faculty of Science Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA
Uncontrolled Keywords: Defect dipoles, Epitaxial heterostructures, Fatigue mechanism, Ferroelectric property, Most likely, Multiferroics, Non-volatile memory application, Single layer films, Epitaxial films, Epitaxial growth, Ferroelectricity, Iron oxides, Ferroelectric films
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Dept of Physics
Depositing User: Miss Malisa Diana
Date Deposited: 29 Jul 2013 00:03
Last Modified: 12 Dec 2014 01:05
URI: http://eprints.um.edu.my/id/eprint/8246

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