University of Oulu

Vats, G., Bai, Y., Zhang, D., Juuti, J., Seidel, J. (2019) Optical Control of Ferroelectric Domains: Nanoscale Insight into Macroscopic Observations. Advanced optical materials, 7 (11), 1800858. doi:10.1002/adom.201800858

Optical control of ferroelectric domains : nanoscale insight into macroscopic observations

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Author: Vats, Gaurav1; Bai, Yang2; Zhang, Dawei1;
Organizations: 1School of Materials Science and Engineering, University of New South Wales, Sydney, NSW, 2052 Australia
2Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, FI‐90014 Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 1.2 MB)
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Language: English
Published: John Wiley & Sons, 2019
Publish Date: 2020-03-18


Domain wall nanoelectronics constitutes a potential paradigm shift for next‐generation energy conversion and von‐Neumann devices. In this context, attempts have been made to achieve energy‐efficient control over ferromagnetic, ferroelectric, and ferroelastic domain walls through electric and magnetic fields or applied stress. However, optical control of ferroic domains offers an additional degree of freedom and significant advantages of reduced hysteresis and Joule heating losses, creating novel opportunities in the regime of nanoelectronics and photonics. Herein, the reversible optical control of ferroelectric domains and domain walls in a novel band‐gap‐engineered lead‐free ferroelectric ceramic ((K0.5Na0.5)NbO3–2 mol% Ba(Ni0.5Nb0.5)O3−δ ) is demonstrated. The optical poling behaves similar to electrical poling and is governed by the bulk ferroelectric photovoltaic effect. The light‐generated charge carriers are transported toward domain walls or electrodes due to a nonzero field in the samples. This causes a change in internal electric field influencing the nanoscale state of polarization, which could also be interesting for other ferroelectrics if the voltage generated by light is in the range of the switching voltages. This work establishes a relationship between light‐induced macroscopic observations and nanoscale changes in the ferroelectric response, providing fundamental insight and facilitating research into ferroelectric photovoltaics and optoelectronics.

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Series: Advanced optical materials
ISSN: 2195-1071
ISSN-E: 2195-1071
ISSN-L: 2195-1071
Volume: 7
Issue: 11
Article number: 1800858
DOI: 10.1002/adom.201800858
Type of Publication: A1 Journal article – refereed
Field of Science: 216 Materials engineering
Funding: This study was funded by Australian Research Council and European Union's Horizon 2020 Research and Innovation Program (Grant Number: 705437).
EU Grant Number: (705437) NextGEnergy - Next Generation Power Sources for Self-sustainable Devices – Integrated Multi-source Energy Harvesters
Copyright information: © 2019 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.