Reversible vs. 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.

arXiv commentMain texte (3 figures) + supplemental Information (3 figures)

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Cited by in corpus (8)

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• Kinetics of ion migration in the electric field-driven manipulation of magnetic anisotropy of Pt/Co/oxide multilayers
• Multiple magneto-ionic regimes in Ta/Co${}_{20}$Fe${}_{60}$B${}_{20}$/HfO${}_2$
• Reliability of Neural Networks Based on Spintronic Neurons
• Hydroxide-based magneto-ionics: electric-field control of reversible paramagnetic-to-ferromagnetic switch in $\alpha$-Co(OH)${}_2$ films
• Tuning the dynamics of chiral domain walls of ferrimagnetic films with the magneto-ionic effect
• Control of the magnetic anisotropy in multi-repeat Pt/Co/Al heterostructures using magneto-ionic gating
• Ab-initio study of magneto-ionic mechanisms in ferromagnet/oxide multilayers