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Updated: Jun 5, 2026
06:53
Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
Spin transfer torques in MnSi at ultralow current densities
F Jonietz1, S Mühlbauer, C Pfleiderer
1Physik-Department E21, Technische Universität München, D-85748 Garching, Germany.
Science (New York, N.Y.)
|December 18, 2010
Summary
Electric currents efficiently manipulate magnetic skyrmions in manganese silicon. This spintronic breakthrough uses minimal current to rotate spin structures, revealing efficient coupling mechanisms.
Area of Science:
- Spintronics
- Condensed Matter Physics
- Materials Science
Background:
- Spin manipulation via electric currents is crucial for spintronics.
- Skyrmion lattices, like those in manganese silicon, exhibit complex magnetic vortex structures.
- Understanding current-driven dynamics in these materials is key for future devices.
Purpose of the Study:
- To investigate the influence of electric currents on the magnetic structure of bulk manganese silicon.
- To observe skyrmion lattice behavior under extremely low current densities.
Main Methods:
- Neutron scattering was employed to probe the magnetic structure.
- Controlled electric currents were applied to a bulk manganese silicon sample.
Main Results:
- Observed rotation of the diffraction pattern in response to electric currents.
- The effect was achieved with currents five orders of magnitude smaller than typical values.
- Demonstrated efficient coupling between inhomogeneous spin currents and topological spin structures.
Conclusions:
- Electric currents can efficiently control magnetic skyrmions in bulk materials.
- The findings suggest a novel mechanism for current-driven magnetization dynamics.
- This work opens new avenues for low-power spintronic devices.
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