Transfer of the exchange bias effect probed by polarized neutron reflectometry
The magnetic reversal behavior of a ferromagnet (FM) coupled through an FeMn antiferromagnet (AF) to a pinned ferromagnet has been investigated by polarized neutron reflectivity (PNR) measurements. With FeMn as the AF layer it is found that there exists 90° interlayer coupling through this layer and that this plays a key role in the transfer of the exchange bias (EB) effect from the FM/AF interface to the AF/pinned-FM interface. Combined with Monte Carlo simulations, researchers demonstrate that the competition between the interlayer coupling and the anisotropy of the AF layer results in a control of the EB effect which has potential for device applications.
These findings may shed light on the mechanism behind the transfer of exchange bias through antiferromagnets.
The full publication can be found here: https://www.nature.com/articles/s41598-019-43251-1