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Journal Articles Physical Review Applied Year : 2020

Reversible and irreversible voltage manipulation of interfacial magnetic anisotropy in Pt/Co/oxide multilayers

Abstract

The perpendicular magnetic anisotropy at the Co/oxide interface in Pt/Co/MOx (MOx = MgOx, AlOx, TbOx) was modified by an electric field using a 10 nm-thick ZrO2 as a solid electrolyte. The large voltage-driven modification of interfacial magnetic anisotropy and the non-volatility of the effect is explained in terms of the migration of oxygen ions towards/away from the Co/MOx interface. While the effect is reversible in Pt/Co/AlOx and Pt/Co/TbOx, where the Co layer can be oxidised or reduced, in Pt/Co/MgOx the effect has been found to be irreversible. We propose that these differences may be related to the different nature of the ionic conduction within the MOx layers.

Dates and versions

hal-02967314 , version 1 (14-10-2020)

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Aymen Fassatoui, Jose Pena Garcia, Laurent Ranno, Jan Vogel, Anne Bernand-Mantel, et al.. Reversible and irreversible voltage manipulation of interfacial magnetic anisotropy in Pt/Co/oxide multilayers. Physical Review Applied, 2020, 14 (6), pp.064041. ⟨10.1103/PhysRevApplied.14.064041⟩. ⟨hal-02967314⟩
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