Deterministic optical control of room temperature multiferroicity in BiFeO3 thin films

Yi De Liou, Yu You Chiu, Ryan Thomas Hart, Chang-Yang Kuo, Yen Lin Huang, Yuan Chih Wu, Rajesh V. Chopdekar, Heng Jui Liu, Arata Tanaka, Chien Te Chen, Chun Fu Chang, Liu Hao Tjeng, Ye Cao, Valanoor Nagarajan, Ying-hao Chu, Yi Chun Chen*, Jan Chi Yang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Controlling ferroic orders (ferroelectricity, ferromagnetism and ferroelasticity) by optical methods is a significant challenge due to the large mismatch in energy scales between the order parameter coupling strengths and the incident photons. Here, we demonstrate an approach to manipulate multiple ferroic orders in an epitaxial mixed-phase BiFeO3 thin film at ambient temperature via laser illumination. Phase-field simulations indicate that a light-driven flexoelectric effect allows the targeted formation of ordered domains. We also achieved precise sequential laser writing and erasure of different domain patterns, which demonstrates a deterministic optical control of multiferroicity at room temperature. As ferroic orders directly influence susceptibility and conductivity in complex materials, our results not only shed light on the optical control of multiple functionalities, but also suggest possible developments for optoelectronics and related applications.

Original languageEnglish
Pages (from-to)580-587
Number of pages8
JournalNature Materials
Volume18
Issue number6
DOIs
StatePublished - 1 Jun 2019

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