Characterization of (Pt2 nm/Co0.4 nm)3/Ptx/IrMn7 nm multilayers by tomographic atom probe: On the role of a Pt spacer - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Applied Physics Année : 2009

Characterization of (Pt2 nm/Co0.4 nm)3/Ptx/IrMn7 nm multilayers by tomographic atom probe: On the role of a Pt spacer

Rodrigue Lardé
Luc Lechevallier
Fabien Cuvilly
Vincent Baltz
B. Dieny

Résumé

Structural investigation of Ta 3 nm / Pt 2 nm / Co 0.4 nm 3 / Pt x / IrMn 7 nm 7 / Pt 10 nm multilayers without x =0 nm and with x = 0.4 nm a Pt spacer has been performed by laser-assisted tomographic atom probe. Without a Pt spacer a strong intermixing is observed at the Co/IrMn interface. In the multilayer containing a Pt spacer the Co/Pt/IrMn interface is very weakly intermixed. It thus appears that the Pt spacer acts as a diffusion barrier that prevents the Ir and Mn atoms from diffusing into the Co layer. The consequences of this effect on the magnetic properties are discussed. The exchange bias field and the anisotropy direction of these two multilayers are analyzed and correlated with the structural investigation.
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Dates et versions

hal-01683832 , version 1 (25-05-2019)

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Amjaad Zarefy, Rodrigue Lardé, Luc Lechevallier, Fabien Cuvilly, Jean Marie Le Breton, et al.. Characterization of (Pt2 nm/Co0.4 nm)3/Ptx/IrMn7 nm multilayers by tomographic atom probe: On the role of a Pt spacer. Journal of Applied Physics, 2009, 105, pp.103912. ⟨10.1063/1.3125527⟩. ⟨hal-01683832⟩
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