Abstract
The magnitude of exchange bias, H E, measured perpendicular to the film plane, can be significantly enhanced by inserting an ultrathin Pt spacer layer between a (Pt/Co) multilayer (ML) with perpendicular anisotropy and an antiferromagnetic (AFM) layer. A less pronounced effect is also observed when the spacer is introduced inside the AFM layer, near the FM–AFM interface. The H E enhancement is attributed to the role of the Pt spacer in increasing the perpendicular component of the ML magnetization and, consequently, the ferromagnetic (FM)/AFM spin projection.
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