Time resolved electrical, optical, and thermal probes of topological spin textures in magnetic nanostructures

Technical Report · Mon Nov 16 04:00:00 EST 2020

DOI:https://doi.org/10.2172/1713205· OSTI ID:1713205

Fuchs, Gregory D ^[1]

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1. Cornell Univ., Ithaca, NY (United States); Cornell University

This project is a fundamental study of magnetization dynamics in nanoscale spin textures with topological properties. One example is magnetic skyrmions that form in chiral ferromagnetic material systems that lack inversion symmetry. We have concentrated on the scalable chiral magnetic metal B20 FeGe thin film that has an asymmetric exchange interaction due to non-centrosymmetric cubic lattice. While the asymmetric exchange interaction can be found at the interface of a ferromagnet and a heavy metal, manipulation of skyrmions at these interfaces is non-trivial due to pinning and it requires higher critical current. In contrast, B20 materials such as FeGe have superior material quality to offer pinning-free and low-current skyrmion motion.

• Research Organization: Cornell Univ., Ithaca, NY (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
• DOE Contract Number: SC0012245
• OSTI ID: 1713205
• Report Number(s): DOE-Cornell--SC0012245
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
chiral magnetism
magnetic helix
magnetic skyrmion
topological magnetism