Skyrmions in a Doped Antiferromagnet
I. Raicevic, Dragana Popovic, C. Panagopoulos, L. Benfatto, M. B., Silva Neto, E. S. Choi, and T. Sasagawa
TL;DR
This paper reports measurements of magnetization and magnetoresistance in a doped antiferromagnetic insulator, providing evidence for the presence of skyrmions through nonmonotonic temperature-dependent magnetoresistance behavior.
Contribution
It presents experimental evidence for skyrmions in a doped antiferromagnetic material, linking magnetoresistance features to skyrmion presence.
Findings
Magnetoresistance step shows nonmonotonic temperature dependence.
Evidence supports skyrmions as responsible for observed magnetic phenomena.
Measurements span wide temperature, field, and orientation ranges.
Abstract
Magnetization and magnetoresistance have been measured in insulating antiferromagnetic La_{2}Cu_{0.97}Li_{0.03}O_{4} over a wide range of temperatures, magnetic fields, and field orientations. The magnetoresistance step associated with a weak ferromagnetic transition exhibits a striking nonmonotonic temperature dependence, consistent with the presence of skyrmions.
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