Control of the noncollinear interlayer exchange coupling

Author(s)
Zachary R. Nunn, Claas Abert, Dieter Suess, Erol Girt
Abstract

Interlayer exchange coupling in transition metal multilayers has been intensively studied for more than three decades and is incorporated into almost all spintronic devices. With the current spacer layers, only collinear magnetic alignment can be reliably achieved; however, controlling the coupling angle has the potential to markedly expand the use of interlayer exchange coupling. Here, we show that the coupling angle between the magnetic moments of two ferromagnetic layers can be precisely controlled by inserting a specially designed magnetic metallic spacer layer between them. The coupling angle is controlled solely by the composition of the spacer layer. Moreover, the biquadratic coupling strength, responsible for noncollinear alignment, is larger than that of current materials. These properties allow for the fabrication and study of not yet realized magnetic structures that have the potential to improve existing spintronic devices.

Organisation(s)
Research Platform MMM Mathematics-Magnetism-Materials, Physics of Functional Materials
External organisation(s)
Simon Fraser University
Journal
Science Advances
Volume
6
No. of pages
8
ISSN
2375-2548
DOI
https://doi.org/10.1126/sciadv.abd8861
Publication date
11-2020
Peer reviewed
Yes
Austrian Fields of Science 2012
103018 Materials physics, 103017 Magnetism
Portal url
https://ucris.univie.ac.at/portal/en/publications/control-of-the-noncollinear-interlayer-exchange-coupling(4df5d4db-8b89-4c6d-978f-dd5ef6828341).html