Structural analysis and magnetic properties of ( Pt / Co ) 3 / Pt tPt / IrMn multilayers

Abstract : Structural and magnetic investigations of Ta 3 nm / Pt 2 nm / Co 0.4 nm 3 / Pt tPt / IrMn 7 nm 7 / Pt 10 nm multilayers with t Pt = 0 and t Pt = 0.4 nm have been carried out using x-ray reflectometry, tomographic atom probe, and superconducting quantum interference device magnetometry. The structural investigations show that the Co/ IrMn interface is more diffuse in the absence of the Pt spacer. The consequences on the magnetic properties are discussed. The exchange-bias field and the anisotropy direction of these two specimens are analyzed in comparison to Ta 3 nm / Pt 2 nm / Co 0.4 nm 3 / Pt tPt / IrMn 7 nm / Pt 10 nm multilayers containing only one ferromagnetic/ antiferromagnetic repeat and correlated with the structural investigations.
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L. Lechevallier, A. Zarefy, R. Lardé, H. Chiron, J.-M. Le Breton, et al.. Structural analysis and magnetic properties of ( Pt / Co ) 3 / Pt tPt / IrMn multilayers. Physical Review B : Condensed matter and materials physics, American Physical Society, 2009, 79, pp.174434. ⟨10.1103/PhysRevB.79.174434⟩. ⟨hal-01683833⟩

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