Out-of-plane exchange bias in [Pt∕Co]–IrMn bilayers sputtered on prepatterned nanostructures - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Physics Letters Année : 2006

Out-of-plane exchange bias in [Pt∕Co]–IrMn bilayers sputtered on prepatterned nanostructures

Résumé

Exchange bias effects along the out-of-plane direction have been investigated in arrays of 100 nm nanostructures prepared on top of prepatterned substrates, consisting of a ferromagnetic Pt/Co multilayer with out-of-plane anisotropy exchange coupled to an antiferromagnetic IrMn layer. A significant loop shift is observed in these nanostructures dots and trenches. The relative evolutions of the bias fields with the IrMn thickness in the nanostructures and in the continuous film are ascribed to both the effects of the IrMn domain size and thermal activation. Lower coordinated spins in the trenches and at the dot edges are assumed to play a key role on the bias properties. A reduction of the blocking temperature is observed for both the dots and the trenches with respect to the continuous film.
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Dates et versions

hal-01683820 , version 1 (25-05-2019)

Identifiants

Citer

A. Bollero, Vincent Baltz, B. Rodmacq, B. Dieny, S. Landis, et al.. Out-of-plane exchange bias in [Pt∕Co]–IrMn bilayers sputtered on prepatterned nanostructures. Applied Physics Letters, 2006, 89, pp.152502. ⟨10.1063/1.2359429⟩. ⟨hal-01683820⟩
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