Inherent Spin-Polarization Coupling in a Magnetoelectric Vortex

Das, S and Laguta, V and Inzani, K and Huang, W and Liu, J and Chatterjee, R and McCarter, MR and Susarla, S and Ardavan, A and Junquera, J and Griffin, SM and Ramesh, R (2022) Inherent Spin-Polarization Coupling in a Magnetoelectric Vortex. In: Nano Letters, 22 (10). pp. 3976-3982.

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Abstract

Solid-state materials are currently being explored as a platform for the manipulation of spins for spintronics and quantum information science. More broadly, a wide spectrum of ferroelectric materials, spanning from inorganic oxides to polymeric systems such as PVDF, present a different approach to explore quantum phenomena in which the spins are set and manipulated with electric fields. Using dilute Fe3+-doped ferroelectric PbTiO3-SrTiO3superlattices as a model system, we demonstrate intrinsic spin-polarization control of spin directionality in complex ferroelectric vortices and skyrmions. Electron paramagnetic resonance (EPR) spectra show that the spins in the Fe3+ion are strongly coupled to the local polarization and preferentially aligned perpendicular to the ferroelectric polar c axis in this complex vortex structure. The effect of polarization-spin directionality is corroborated by first-principles calculations, demonstrating the variation of the spin directionality with the polar texture and offering the potential for future quantum analogues of macroscopic magnetoelectric devices. © 2022 American Chemical Society. All rights reserved.

Item Type:	Journal Article
Publication:	Nano Letters
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to the American Chemical Society.
Keywords:	Calculations; Electric fields; Electron resonance; Electron spin resonance spectroscopy; Ferroelectricity; Lead titanate; Paramagnetism; Quantum optics; Spin polarization; Strontium titanates; Textures; Vortex flow, Ferroelectric vortex; Ferroelectrics materials; First principle calculations; Magnetoelectrics; Polarization coupling; Quantum information science; Solid-state materials; Spin manipulation; Spin-polarization; Wide spectrum, Paramagnetic resonance
Department/Centre:	Division of Chemical Sciences > Materials Research Centre
Date Deposited:	21 Sep 2022 10:11
Last Modified:	21 Sep 2022 10:11
URI:	https://eprints.iisc.ac.in/id/eprint/76715

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