Zhan X Z, Li G, Cai J W, Zhu T, Cooper J F K, Kinane C J, Langridge S
Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
Dongguan Neutron Science Center, Dongguan, 523803, China.
Sci Rep. 2019 Apr 30;9(1):6708. doi: 10.1038/s41598-019-43251-1.
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 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, we 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.
通过极化中子反射率测量研究了一种铁磁体（FM）通过FeMn反铁磁体（AF）与一个 pinned 铁磁体耦合时的磁反转行为。以FeMn作为反铁磁层，发现通过该层存在90°层间耦合，并且这在交换偏置（EB）效应从FM/AF界面转移到AF/pinned-FM界面中起着关键作用。结合蒙特卡罗模拟，我们证明层间耦合与反铁磁层各向异性之间的竞争导致对EB效应的控制，这在器件应用方面具有潜力。
