NonVolatile Ionic Modification of the Dzyaloshinskii-Moriya Interaction

Published

September 4, 2019

Author(s)

L. Herrera Diez, Y. T. Liu, Dustin A. Gilbert, M. Belmeguenai, J. Vogel, S. Pizzini, E. Martinez, A. Lamperti, J. B. Mohammedi, A. Laborieux, Y. Roussigne, Alexander Grutter, E. Arenholtz, Patrick Quarterman, Brian B. Maranville, S. Ono, M. Salah El Hadri, R. Tolley, E. E. Fullerton, L. Sanchez-Tejerina, A. Stashkevich, S. M. Cherif, A. D. Kent, D. Querlioz, J. Langer, B. Ocker, D. Ravelosona

Abstract

The possibility to tune the Dzyaloshinskii Moriya interaction (DMI) by electric (E) field gating in ultra-thin magnetic materials has opened new perspectives in terms of controlling the stabilization of chiral spin structures. Most recent efforts have used voltage-induced charge redistribution at the interface between a metal an oxide to modulate DMI. This approach is attractive for active devices but it tends to be volatile, making it energy demanding, and it is limited by Coulomb screening in the metal. Here we have demonstrated the non-volatile E-field manipulation of DMI by ionic liquid gating of Pt/Co/HfO₂ ultra-thin films. The E-field effect on DMI scales with the E-field exposure and is proposed to be linked to the migration and subsequent anchoring of oxygen species from the HfO₂ into the Co and Pt layers. This effect permanently changes the properties of the material showing that E-fields can not only be used for local gating in devices but also as a highly scalable materials design tool for post-growth tuning of DMI.

Citation

Physical Review Applied

Volume

12

Issue

3

Pub Type

Journals

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Keywords

Magnetism, film, skyrmion, Dzyaloshinskii Moriya, neutron, ionic liquid, magneto-ionic

Citation

Herrera Diez, L. , Liu, Y. , Gilbert, D. , Belmeguenai, M. , Vogel, J. , Pizzini, S. , Martinez, E. , Lamperti, A. , Mohammedi, J. , Laborieux, A. , Roussigne, Y. , Grutter, A. , Arenholtz, E. , Quarterman, P. , Maranville, B. , Ono, S. , Salah El Hadri, M. , Tolley, R. , Fullerton, E. , Sanchez-Tejerina, L. , Stashkevich, A. , Cherif, S. , Kent, A. , Querlioz, D. , Langer, J. , Ocker, B. and Ravelosona, D. (2019), NonVolatile Ionic Modification of the Dzyaloshinskii-Moriya Interaction, Physical Review Applied, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=928214 (Accessed April 25, 2024)