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Article Dans Une Revue Physical Review B: Condensed Matter and Materials Physics (1998-2015) Année : 2006

Magnetic behavior of systems composed of coupled ferromagnetic bilayers with distinct anisotropy directions

Résumé

A shift in the hysteresis loop of a NiFe thin film with in-plane anisotropy exchange coupled to a Pt/ Co multilayer with out-of-plane anisotropy is observed after in-plane saturation of the system. The origin of this effect and the related magnetic properties are investigated by means of in-plane and out-of-plane magnetom-etry techniques, magnetic force microscopy imaging, and micromagnetic simulations. Both the number of Pt/ Co repetitions in the multilayer and the NiFe thickness are found to have an influence on the magnitude of the loop shift and the in-plane and out-of-plane coercivity values of the system. This is correlated with variations in the number and average size of the magnetic domains formed in the Pt/ Co multilayer which, as revealed by micromagnetic simulations, pin the NiFe magnetization via formation of closure domains with a preferential orientation at the interface between the Pt/ Co multilayer and the NiFe.
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Dates et versions

hal-01683818 , version 1 (25-05-2019)

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Citer

A. Bollero, L. D. Buda-Prejbeanu, Vincent Baltz, J. Sort, B. Rodmacq, et al.. Magnetic behavior of systems composed of coupled ferromagnetic bilayers with distinct anisotropy directions. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2006, 73, pp.144407. ⟨10.1103/PhysRevB.73.144407⟩. ⟨hal-01683818⟩
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