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Coherent x-ray diffraction imaging of photo-induced structural changes in BiFeO 3 nanocrystals

DOI: 10.1088/1367-2630/18/9/093003 DOI Help

Authors: Marcus Newton (University of Southampton) , Aaron Parsons (Diamond Light Source) , Ulrich Wagner (Diamond Light Source) , Christoph Rau (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: New Journal Of Physics , VOL 18

State: Published (Approved)
Published: September 2016
Diamond Proposal Number(s): 11937 , 13656

Open Access Open Access

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.

Journal Keywords: Bismuth Ferrite, multi-ferroics, Coherent X-ray Diffraction Imaging

Subject Areas: Materials, Physics, Energy

Instruments: I13-1-Coherence

Other Facilities: No.

Added On: 05/09/2016 12:34


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