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Light-induced size changes in BiFeO3 crystals

Light-induced size changes in BiFeO3 crystals
Light-induced size changes in BiFeO3 crystals
Multifunctional oxides are promising materials because of their fundamental physical properties as well as their potential in applications. Among these materials, multiferroics exhibiting ferroelectricity and magnetism are good candidates for spin electronic applications using the magnetoelectric effect, which couples magnetism and ferroelecticity. Furthermore, because ferroelectrics are insulators with a reasonable bandgap, photons can efficiently interact with electrons leading to photoconduction or photovoltaic effects. However, until now, coupling of light with mechanical degrees of freedom has been elusive, although ferroelasticity is a well-known property of these materials. Here, we report on the observation, for the first time, of a substantial visible-light-induced change in the dimensions of BiFeO3 crystals at room temperature. The relative light-induced photostrictive effect is of the order of 10-5 with response times below 0.1 s. It depends on the polarization of incident light as well as applied magnetic fields. This opens the perspective of combining mechanical, magnetic, electric and optical functionalities in future generations of remote switchable devices.
electronic material, magnetic materials
1476-1122
803-805
Kundys, B.
232c3004-e185-4d49-bfea-5ce652704e23
Viret, M.
587e5a76-41a7-49e3-9071-ae0249ac5eae
Colson, D.
18e1822b-0206-486d-b19a-f86017e384d1
Kundys, D.O.
19eedf85-4e93-4d61-98d0-b1dcf20d4598
Kundys, B.
232c3004-e185-4d49-bfea-5ce652704e23
Viret, M.
587e5a76-41a7-49e3-9071-ae0249ac5eae
Colson, D.
18e1822b-0206-486d-b19a-f86017e384d1
Kundys, D.O.
19eedf85-4e93-4d61-98d0-b1dcf20d4598

Kundys, B., Viret, M., Colson, D. and Kundys, D.O. (2010) Light-induced size changes in BiFeO3 crystals. Nature Materials, 9, 803-805. (doi:10.1038/nmat2807).

Record type: Article

Abstract

Multifunctional oxides are promising materials because of their fundamental physical properties as well as their potential in applications. Among these materials, multiferroics exhibiting ferroelectricity and magnetism are good candidates for spin electronic applications using the magnetoelectric effect, which couples magnetism and ferroelecticity. Furthermore, because ferroelectrics are insulators with a reasonable bandgap, photons can efficiently interact with electrons leading to photoconduction or photovoltaic effects. However, until now, coupling of light with mechanical degrees of freedom has been elusive, although ferroelasticity is a well-known property of these materials. Here, we report on the observation, for the first time, of a substantial visible-light-induced change in the dimensions of BiFeO3 crystals at room temperature. The relative light-induced photostrictive effect is of the order of 10-5 with response times below 0.1 s. It depends on the polarization of incident light as well as applied magnetic fields. This opens the perspective of combining mechanical, magnetic, electric and optical functionalities in future generations of remote switchable devices.

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More information

Published date: 25 July 2010
Keywords: electronic material, magnetic materials

Identifiers

Local EPrints ID: 177069
URI: http://eprints.soton.ac.uk/id/eprint/177069
ISSN: 1476-1122
PURE UUID: 0ab344b2-b0b3-4b1a-9296-2b32e54b1ffe

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Date deposited: 15 Mar 2011 09:49
Last modified: 03 Oct 2019 16:31

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Contributors

Author: B. Kundys
Author: M. Viret
Author: D. Colson
Author: D.O. Kundys

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