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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.
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https://hal.archives-ouvertes.fr/hal-02967314
Contributor : Hélène Béa <>
Submitted on : Wednesday, October 14, 2020 - 7:04:32 PM
Last modification on : Monday, June 14, 2021 - 10:02:02 AM

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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, American Physical Society, 2020, 14 (6), pp.064041. ⟨10.1103/PhysRevApplied.14.064041⟩. ⟨hal-02967314⟩

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