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Electrostatic coupling and interface intermixing in ferroelectric superlattices

Electrostatic coupling and interface intermixing in ferroelectric superlattices
Electrostatic coupling and interface intermixing in ferroelectric superlattices
A thermodynamic model is developed to study electrostatic coupling and interface intermixing in superlattices comprising alternate layers of ferroelectrics and paraelectrics. Interface intermixing leads to inhomogeneous internal electric field and polarization in superlattices. The spatial distribution of polarization extends into the layer over a distance governed by its correlation length. Periodic modulation of the internal electric field and polarization in superlattices are correlated. Interface intermixing enhances the depolarization field of superlattices; however, it has a negligible effect on polarization and transition temperature. The internal electric field, originating from the electrostatic coupling between ferroelectric layers, plays a dominant role in determining the properties of superlattices.
0295-5075
1-7
Lim, K.-G.
927dad30-b19f-4376-8650-cdb1cbdd29b1
Chew, K.-H.
ee005c27-e238-489a-bc97-dc91ddfb0a9c
Ong, L.-H.
0c7e041f-8ec9-4c48-bda0-a5c3d46e0876
Iwata, M.
940a0ed2-51a0-4cd1-9290-a5452c57f886
Lim, K.-G.
927dad30-b19f-4376-8650-cdb1cbdd29b1
Chew, K.-H.
ee005c27-e238-489a-bc97-dc91ddfb0a9c
Ong, L.-H.
0c7e041f-8ec9-4c48-bda0-a5c3d46e0876
Iwata, M.
940a0ed2-51a0-4cd1-9290-a5452c57f886

Lim, K.-G., Chew, K.-H., Ong, L.-H. and Iwata, M. (2012) Electrostatic coupling and interface intermixing in ferroelectric superlattices. Europhysics Letters, 99 (4), 1-7, [46004]. (doi:10.1209/0295-5075/99/46004).

Record type: Article

Abstract

A thermodynamic model is developed to study electrostatic coupling and interface intermixing in superlattices comprising alternate layers of ferroelectrics and paraelectrics. Interface intermixing leads to inhomogeneous internal electric field and polarization in superlattices. The spatial distribution of polarization extends into the layer over a distance governed by its correlation length. Periodic modulation of the internal electric field and polarization in superlattices are correlated. Interface intermixing enhances the depolarization field of superlattices; however, it has a negligible effect on polarization and transition temperature. The internal electric field, originating from the electrostatic coupling between ferroelectric layers, plays a dominant role in determining the properties of superlattices.

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Published date: 29 August 2012

Identifiers

Local EPrints ID: 422855
URI: http://eprints.soton.ac.uk/id/eprint/422855
ISSN: 0295-5075
PURE UUID: 8ee76006-b06b-4f65-8d0d-69ac6134824f

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Date deposited: 07 Aug 2018 16:30
Last modified: 15 Mar 2024 21:09

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Contributors

Author: K.-G. Lim
Author: K.-H. Chew
Author: L.-H. Ong
Author: M. Iwata

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