Magnetization Reversal Mechanism in Exchange-Biased Spring-like Thin-Film Composite
arXiv:2101.12495 · doi:10.1021/acsami.0c14115
Abstract
Development of modern spintronic devices requires materials exhibiting specific magnetic effects. In this paper, we investigate a magnetization reversal mechanism in a [Co/Pdx]7/CoO/[Co/Pdy]7 thin-film composite where an antiferromagnet is sandwiched between a hard and a soft ferromagnets with different coercivities. The antiferromagnet/ferromagnet interfaces give rise to the exchange bias effect. The application of soft and hard ferromagnetic films causes exchange-spring-like behavior while the choice of the Co/Pd multilayers provides large out-of-plane magnetic anisotropy. We observed that the magnitude and the sign of the exchange bias anisotropy field are related to the arrangement of the magnetic moments in the antiferromagnetic layer. This ordering is induced by the spin orientation present in neighboring ferromagnetic films which is, in turn, dependent on the orientation and strength of the external magnetic field.
10 pages, 6 figires, Open Access article
References in corpus (4)
- Controlling magnetization reversal in Co/Pt nanostructures with perpendicular anisotropy
- The influence of superparamagnetism on exchange anisotropy at CoO/[Co/Pd] interfaces
- Spin configurations in hard-soft coupled bilayer systems: from rigid magnet to exchange spring transitions
- New Reversal Mode in Exchange Coupled Antiferromagnetic/Ferromagnetic Disks: Distorted Viscous Vortex