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Coherent X-ray diffraction imaging of photo-induced structural changes in BiFeO3 nanocrystals

Coherent X-ray diffraction imaging of photo-induced structural changes in BiFeO3 nanocrystals
Coherent X-ray diffraction imaging of photo-induced structural changes in BiFeO3 nanocrystals
Multiferroic materials that exhibit coupling between ferroelectric and magnetic properties are of considerable utility for technological applications and are also interesting from a fundamental standpoint. When reduced to the nanoscale, multiferroic materials often display additional functionality that is dominated by interfacial and confinement effects. Bismuth ferrite (BiFeO3) is one such material with room temperature anti-ferromagnetic and ferroelectric ordering. Optical excitation of BiFeO3 crystals results in an elastic structural deformation of the lattice with a fast response on the pico-second time scale. Here we report on dynamic measurements to investigate the structural properties of BiFeO3 nanoscale crystals using laser excitation and three-dimensional Bragg coherent x-ray diffraction imaging. Tensile strain beyond 8 × 10-2 was observed predominantly at the surface of the nanoscale crystal as evidenced in the reconstructed phase information and was correlated to photo-induced lattice deformation.
1-7
Newton, Marcus
fac92cce-a9f3-46cd-9f58-c810f7b49c7e
Parsons, Aaron
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Wagner, Ulrich
f573581c-cf12-4d92-8bce-1035997b2c09
Rau, Christopher
f8828e6e-e5fc-4b6f-b673-409c92e9ccf1
Newton, Marcus
fac92cce-a9f3-46cd-9f58-c810f7b49c7e
Parsons, Aaron
d8a6b6ef-7b8b-497e-aaaa-cc51657c0bf2
Wagner, Ulrich
f573581c-cf12-4d92-8bce-1035997b2c09
Rau, Christopher
f8828e6e-e5fc-4b6f-b673-409c92e9ccf1

Newton, Marcus, Parsons, Aaron, Wagner, Ulrich and Rau, Christopher (2016) Coherent X-ray diffraction imaging of photo-induced structural changes in BiFeO3 nanocrystals. New Journal of Physics, 18 (93003), 1-7. (doi:10.1088/1367-2630/18/9/093003).

Record type: Article

Abstract

Multiferroic materials that exhibit coupling between ferroelectric and magnetic properties are of considerable utility for technological applications and are also interesting from a fundamental standpoint. When reduced to the nanoscale, multiferroic materials often display additional functionality that is dominated by interfacial and confinement effects. Bismuth ferrite (BiFeO3) is one such material with room temperature anti-ferromagnetic and ferroelectric ordering. Optical excitation of BiFeO3 crystals results in an elastic structural deformation of the lattice with a fast response on the pico-second time scale. Here we report on dynamic measurements to investigate the structural properties of BiFeO3 nanoscale crystals using laser excitation and three-dimensional Bragg coherent x-ray diffraction imaging. Tensile strain beyond 8 × 10-2 was observed predominantly at the surface of the nanoscale crystal as evidenced in the reconstructed phase information and was correlated to photo-induced lattice deformation.

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More information

Accepted/In Press date: 28 July 2016
e-pub ahead of print date: 2 September 2016
Published date: 2 September 2016
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 399986
URI: http://eprints.soton.ac.uk/id/eprint/399986
PURE UUID: 58e23ae9-0e88-4f28-98e6-fa945a1b5cb8

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Date deposited: 06 Sep 2016 11:00
Last modified: 16 Dec 2019 19:44

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