Journal
NATURE NANOTECHNOLOGY
Volume 13, Issue 12, Pages 1154-+Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41565-018-0255-3
Keywords
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Funding
- US Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0012371]
- DARPA TEE program
- NSF Graduate Research Fellowship Program
- GEM Consortium
- DFG [BU 3297/1-1]
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Spintronics is a research field that aims to understand and control spins on the nanoscale and should enable next-generation data storage and manipulation. One technological and scientific key challenge is to stabilize small spin textures and to move them efficiently with high velocities. For a long time, research focused on ferromagnetic materials, but ferromagnets show fundamental limits for speed and size. Here, we circumvent these limits using compensated ferrimagnets. Using ferrimagnetic Pt/Gd44Co56/TaOx films with a sizeable Dzyaloshinskii-Moriya interaction, we realize a current-driven domain wall motion with a speed of 1.3 km s(-1) near the angular momentum compensation temperature (T-A) and room-temperature-stable skyrmions with minimum diameters close to 10 nm near the magnetic compensation temperature (T-M). Both the size and dynamics of the ferrimagnet are in excellent agreement with a simplified effective ferromagnet theory. Our work shows that high-speed, high-density spintronics devices based on current-driven spin textures can be realized using materials in which T-A and T-M are close together.
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