Inherent Spin–Polarization Coupling in a Magnetoelectric Vortex

Das, Sujit; Laguta, Valentyn; Inzani, Katherine; Huang, Weichuan; Liu, Junjie; Chatterjee, Ruchira; McCarter, Margaret R.; Susarla, Sandhya; Ardavan, Arzhang; Junquera, Javier; Griffin, Sinéad M.; Ramesh, Ramamoorthy

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-SrTiO3 superlattices 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.

Citation

Das, S., Laguta, V., Inzani, K., Huang, W., Liu, J., Chatterjee, R., McCarter, M. R., Susarla, S., Ardavan, A., Junquera, J., Griffin, S. M., & Ramesh, R. (2022). Inherent Spin–Polarization Coupling in a Magnetoelectric Vortex. Nano Letters, 22(10), 3976-3982. https://doi.org/10.1021/acs.nanolett.2c00496

• Journal Article Type: Article
• Acceptance Date: May 13, 2022
• Online Publication Date: May 13, 2022
• Publication Date: May 25, 2022
• Deposit Date: Jun 21, 2022
• Publicly Available Date: May 14, 2023
• Journal: Nano Letters
• Print ISSN: 1530-6984
• Electronic ISSN: 1530-6992
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 22
• Issue: 10
• Pages: 3976-3982
• DOI: https://doi.org/10.1021/acs.nanolett.2c00496
• Keywords: Mechanical Engineering; Condensed Matter Physics; General Materials Science; General Chemistry; Bioengineering
• Public URL: https://nottingham-repository.worktribe.com/output/8629931
• Publisher URL: https://pubs.acs.org/doi/full/10.1021/acs.nanolett.2c00496