The Dzyaloshinskii-Moriya interaction (DMI) creates spin spirals and supports chiral magnetic structures, making it highly desirable for low-power spin-based memory, logic, and signal transmission. However, achieving nonvolatile control of the DMI remains a big challenge, especially at ferromagnetic interfaces under ambient temperatures. Here, we demonstrate ferroelectricity-controlled modulation of the DMI at $\mathrm{Fe}/\mathrm{Pb}{\left(\mathrm{M}{\mathrm{g}}_{1/3}\mathrm{N}{\mathrm{b}}_{2/3}\right)}_{0.7}\mathrm{T}{\mathrm{i}}_{0.3}{\mathrm{O}}_3$ interfaces using Brillouin light scattering (BLS). We observed a variation of more than 65% in DMI strength upon applying a strong electric field. This modulation is attributed to the interfacial Rashba spin-orbit coupling induced solely by ferroelectricity, which exhibits hysteresis-loop-like behavior in response to electric fields. The capability to modulate the DMI with external electric fields at room temperature positions vortexlike structures as promising candidates for chiral spintronics.

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• Dzyaloshinskii-Moriya interaction
• Ferroelectricity
• Rashba coupling
• Ferroelectrics
• Magnetic thin films
• Brillouin scattering & spectroscopy