Anisotropic Ferroelectricity in Polar Vortices

Behera, P and Ross, AM and Shanker, N and Meisenheimer, P and Manna, M and Lin, C-C and Hsu, S-L and Harris, I and Kavle, P and Husain, S and Ojha, SK and Das, S and Raja, A and Martin, LW and Susarla, S and Salahuddin, S and Chen, L-Q and Ramesh, R (2024) Anisotropic Ferroelectricity in Polar Vortices. In: Advanced Materials .

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Abstract

The exotic polarization configurations of topologically protected dipolar textures have opened new avenues for realizing novel phenomena absent in traditional ferroelectric systems. While multiple recent studies have revealed a diverse array of emergent properties in such polar topologies, the details of their atomic and mesoscale structures remain incomplete. Through atomic- and meso-scale imaging techniques, the emergence of a macroscopic ferroelectric polarization along both principal axes of the vortex lattice while performing phase-field modeling to probe the atomic scale origins of these distinct polarization components is demonstrated. Additionally, due to the anisotropic epitaxial strain, the polarization switching behavior perpendicular and parallel to the vortices is highly anisotropic, with switching along the vortex axes occurring over numerous decades in field-pulse width. This slow switching process allows for the deterministic control of the polarization state, enabling a non-volatile, multi-state memory with excellent distinguishability and long retention times. © 2024 Wiley-VCH GmbH.

Item Type:	Journal Article
Publication:	Advanced Materials
Publisher:	John Wiley and Sons Inc
Additional Information:	The copyright for this article belongs to publisher.
Keywords:	Anisotropy; Crystal atomic structure; Ferroelectric materials; Ferroelectricity; Polarization, Atomic scale; Domain structure; Emergent property; Ferroelectric polarization; Ferroelectric system; Meso scale; Mesoscale structure; Polar vortex; Principal axis; Vortex lattices, Atoms
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	27 Nov 2024 13:10
Last Modified:	27 Nov 2024 13:10
URI:	http://eprints.iisc.ac.in/id/eprint/86915

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