Reversible writing/deleting of magnetic skyrmions through hydrogen adsorption/desorption

Gong Chen (), Colin Ophus, Alberto Quintana, Heeyoung Kwon, Changyeon Won, Haifeng Ding, Yizheng Wu, Andreas K. Schmid and Kai Liu ()
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Gong Chen: Georgetown University
Colin Ophus: NCEM, Molecular Foundry, Lawrence Berkeley National Laboratory
Alberto Quintana: Georgetown University
Heeyoung Kwon: Center for Spintronics, Korea Institute of Science and Technology
Changyeon Won: Kyung Hee University
Haifeng Ding: National Laboratory of Solid State Microstructures, Department of Physics and Collaborative Innovation Center of Advanced Microstructures, Nanjing University
Yizheng Wu: State Key Laboratory of Surface Physics and Advanced Materials Laboratory, Fudan University
Andreas K. Schmid: NCEM, Molecular Foundry, Lawrence Berkeley National Laboratory
Kai Liu: Georgetown University

Nature Communications, 2022, vol. 13, issue 1, 1-8

Abstract: Abstract Magnetic skyrmions are topologically nontrivial spin textures with envisioned applications in energy-efficient magnetic information storage. Toggling the presence of magnetic skyrmions via writing/deleting processes is essential for spintronics applications, which usually require the application of a magnetic field, a gate voltage or an electric current. Here we demonstrate the reversible field-free writing/deleting of skyrmions at room temperature, via hydrogen chemisorption/desorption on the surface of Ni and Co films. Supported by Monte-Carlo simulations, the skyrmion creation/annihilation is attributed to the hydrogen-induced magnetic anisotropy change on ferromagnetic surfaces. We also demonstrate the role of hydrogen and oxygen on magnetic anisotropy and skyrmion deletion on other magnetic surfaces. Our results open up new possibilities for designing skyrmionic and magneto-ionic devices.

Date: 2022
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DOI: 10.1038/s41467-022-28968-4

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