Local and global energy barriers for chiral domain walls in synthetic antiferromagnet-ferromagnet lateral junctions.

ABSTRACT: Of great promise are synthetic antiferromagnet-based racetrack devices in which chiral composite domain walls can be efficiently moved by current. However, overcoming the trade-off between energy efficiency and thermal stability remains a major challenge. Here we show that chiral domain walls in a synthetic antiferromagnet-ferromagnet lateral junction are highly stable against large magnetic fields, while the domain walls can be efficiently moved across the junction by current. Our approach takes advantage of field-induced global energy barriers in the unique energy landscape of the junction that are added to the local energy barrier. We demonstrate that thermal fluctuations are equivalent to the magnetic field effect, thereby, surprisingly, increasing the energy barrier and further stabil

SUBMITTER: Yoon J 

PROVIDER: S-EPMC9646530 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature