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Single-domain multiferroic BiFeO3 films

by Tjeng, L. H. , Vasudevan, R. K. , Lai, C.-H. , Agrestini, S. , Pi, T. W. , Tanaka, A. , Liu, H. J. , Huang, Y. L. , Jesse, S. , Chu, Y. H. , Okatan, M. B. , Hu, Z. , Liao, S.-C. , Chen, K. , Ohresser, P. , Kalinin, S. V. , Kuo, C.-Y. , Yang, J. C. , Li, L.

in 140/146 / 639/301/119/996 / 639/301/119/997 / CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY / domains / Electrons / ferroelectric / Humanities and Social Sciences / Magnetism / Materials science / multidisciplinary / multiferroic / piezoresponse force microscopy / Science / Science (multidisciplinary) / Spectrum analysis / Thin films

2016

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2016

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2016

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Journal Article

Single-domain multiferroic BiFeO3 films

Tjeng, L. H.,

Vasudevan, R. K.,

Lai, C.-H.,

Agrestini, S.,

Pi, T. W.,

Tanaka, A.,

Liu, H. J.,

Huang, Y. L.,

Jesse, S.,

Chu, Y. H.,

Okatan, M. B.,

Hu, Z.,

Liao, S.-C.,

Chen, K.,

Ohresser, P.,

Kalinin, S. V.,

Kuo, C.-Y.,

Yang, J. C.,

Li, L.

2016

Overview

The strong coupling between antiferromagnetism and ferroelectricity at room temperature found in BiFeO 3 generates high expectations for the design and development of technological devices with novel functionalities. However, the multi-domain nature of the material tends to nullify the properties of interest and complicates the thorough understanding of the mechanisms that are responsible for those properties. Here we report the realization of a BiFeO 3 material in thin film form with single-domain behaviour in both its magnetism and ferroelectricity: the entire film shows its antiferromagnetic axis aligned along the crystallographic b axis and its ferroelectric polarization along the c axis. With this we are able to reveal that the canted ferromagnetic moment due to the Dzyaloshinskii–Moriya interaction is parallel to the a axis. Furthermore, by fabricating a Co/BiFeO 3 heterostructure, we demonstrate that the ferromagnetic moment of the Co film does couple directly to the canted moment of BiFeO 3 . The coupling of ferroelectric and antiferromagnetic order in BiFeO 3 makes it appealing for applications however the presence of domain structure acts to undermine this potential. Here, the authors demonstrate BiFeO 3 thin films with a single domain of electrical polarization and canted antiferromagnetic order.

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Publisher

Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio

Subject

140/146

/ 639/301/119/996

/ 639/301/119/997

/ CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY

/ domains

/ Electrons

/ ferroelectric