Publication date: 22nd July 2026
The energy-efficient manipulation of magnetic textures such as domain walls and skyrmions is central to emerging spintronic memory technologies and is opening new opportunities for unconventional computing. Key challenges remain, however, including domain wall pinning, controlled skyrmion nucleation and propagation, and the high current densities typically required to manipulate these magnetic textures.
Magneto-ionics offers a powerful route to address these challenges by dynamically tuning magnetic anisotropy with voltage, thereby controlling the nucleation, propagation, and dynamics of magnetic textures. In this talk, I will show that using ionic liquid gating non-volatile magneto-ionic effects and volatile charge effects can be combined to facilitate current-driven skyrmion nucleation in magnetic tracks. In this device design, rather than occurring uniformly, skyrmion nucleation propagates as a front driven by an electric-field gradient coupled to the spin-orbit torque current pulse. This provides a means to control not only the nucleation but also the position of a skyrmion front along a track using an electric field and a single current pulse.
I will also present magneto-ionic devices in which voltage control of magnetic anisotropy enables reversible tuning of the dynamics of three-dimensional chiral magnetic textures in dipolarly coupled multilayers. Modifying the anisotropy of the top magnetic layer strongly influences the spin structure throughout the entire multilayer stack, providing a versatile approach to engineering 3D magnetic texture dynamics for voltage-programmable spintronic devices.
Finally, I will demonstrate that a volatile gate-induced reduction of magnetic anisotropy can create a time-dependent switching probability driven by spin-orbit-torque-induced domain wall motion. This enables a single device to combine long-term magnetic information storage with short-term ionic update eligibility, a functionality particularly attractive for reward-based learning schemes.
These findings highlight the versatility and promise of magneto-ionic devices for controlling the dynamics of magnetic textures and for the design of spin-dependent neuromorphic hardware
We acknowledge financial support from the Horizon Europe program through the projects SkyANN (101135729) and METASPIN (101098651), and from a France 2030 government grant managed by the French National Research Agency (ANR-22-EXSP-0002 PEPR SPIN CHIREX). This work was also partly supported by the French RENATECH network.
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