Diameter-independent skyrmion Hall angle observed in chiral magnetic multilayers.

ABSTRACT: Magnetic skyrmions are topologically non-trivial nanoscale objects. Their topology, which originates in their chiral domain wall winding, governs their unique response to a motion-inducing force. When subjected to an electrical current, the chiral winding of the spin texture leads to a deflection of the skyrmion trajectory, characterised by an angle with respect to the applied force direction. This skyrmion Hall angle is predicted to be skyrmion diameter-dependent. In contrast, our experimental study finds that the skyrmion Hall angle is diameter-independent for skyrmions with diameters ranging from 35 to 825?nm. At an average velocity of 6?±?1?ms^-1, the average skyrmion Hall angle was measured to be 9°?±?2°. In fact, the skyrmion dynamics is dominated by the local energy landscape such as materials defects and the local magnetic configuration.

SUBMITTER: Zeissler K 

PROVIDER: S-EPMC6976618 | biostudies-literature | 2020 Jan

REPOSITORIES: biostudies-literature