IrMn as exchange-biasing material in systems with perpendicular magnetic anisotropy

Sebastiaan van Dijken, Magali Besnier, Jerome Moritz, J. M. D. Coey
2005 Journal of Applied Physics  
Contact between a Co/ Pt multilayer and an IrMn film leads to perpendicular exchange bias. The exchange bias field does not depend on the degree of ͑111͒ film texture and for Co/ Pt multilayers with IrMn at the bottom it can be enhanced by magnetic field annealing. The perpendicular exchange bias of the Co/ Pt-IrMn system is limited by a misalignment between the Co spins and the film normal, which is due to a negative magnetic anisotropy contribution from the Co/ IrMn interface ͑K S Co/IrMn =
more » ... .09 mJ/ m 2 ͒. The insertion of a 3 Å thick Pt layer at the Co/ IrMn interface maximizes the perpendicular exchange-bias field.
doi:10.1063/1.1855699 fatcat:s63j7emb5rhxdhiaeg3xxxa6yq