Inherent Spin-Polarization Coupling in a Magnetoelectric Vortex.
basic_science · Level V
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- Record sourced from PubMed, PMID 35561341.
- Also identified by DOI 10.1021/acs.nanolett.2c00496.
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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 Fe<sup>3+</sup>-doped ferroelectric PbTiO<sub>3</sub>-SrTiO<sub>3</sub> 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 Fe<sup>3+</sup> ion are strongly coupled to the local polarization and preferentially aligned perpendicular to the ferroelectric polar <i>c</i> 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.