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28 September 2023 Magneto-ionic control of spin textures and interfaces
Kai Liu
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Proceedings Volume PC12656, Spintronics XVI; PC1265612 (2023) https://doi.org/10.1117/12.2677247
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Magneto-ionics has shown promise for energy-efficient nanoelectronics, where ionic migration can be used to achieve atomic scale control of interfaces in magnetic nanostructures, and in turn modulate a wide variety of functionalities. Recently, we have discovered that chemisorbed oxygen and hydrogen on the surface of ferromagnetic films can induce significant Dzyaloshinskii–Moriya interaction (DMI) [1], a handle to introduce topology into nanoscale magnets. This has enabled direct tailoring of skyrmions winding number as well as wall type at room temperature via oxygen chemisorption. We have also demonstrated a sensitive and reversible chirality switching of magnetic domain walls [2] and writing/deleting of skyrmions [3] via hydrogen chemisorption/desorption [3] or changing the thickness of a sub-monolayer Pd capping layer [4]. These effects offer an ideal platform to gain quantitative understanding of magneto-ionics at buried interfaces, where the ionic motion can be further controlled by an electric field, leading to modulation of such functionality as exchange bias [5,6].
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Kai Liu "Magneto-ionic control of spin textures and interfaces", Proc. SPIE PC12656, Spintronics XVI, PC1265612 (28 September 2023); https://doi.org/10.1117/12.2677247
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KEYWORDS
Interfaces
Hydrogen
Magnetism
Modulation
Oxygen
Ferromagnetics
Nanoelectronics
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