Inherent Spin–Polarization Coupling in a Magnetoelectric Vortex
| Autor: | Das, Sujit, Laguta, Valentyn, Inzani, Katherine, Huang, Weichuan, Liu, Junjie, Chatterjee, Ruchira, McCarter, Margaret R., Susarla, Sandhya, Ardavan, Arzhang, Junquera, Javier, Ramesh, Ramamoorthy |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| ISSN: | 1530-6984 1530-6992 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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