Non-volatile electrically-driven repeatable magnetization reversal with no applied magnetic field

M. Ghidini, R. Pellicelli, J.L. Prieto, X. Moya, J. Soussi, J. Briscoe, S. Dunn and N.D. Mathur ()
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M. Ghidini: Department of Materials Science
R. Pellicelli: DiFeST, University of Parma
J.L. Prieto: Instituto de Sistemas Optoelectrónicos y Microtecnología (ISOM)—Universidad Politécnica de Madrid
X. Moya: Department of Materials Science
J. Soussi: Department of Materials Science
J. Briscoe: Nanotechnology Centre, School of Applied Sciences, Cranfield University, Cranfield, Bedfordshire
S. Dunn: Centre for Materials Research, Queen Mary University of London
N.D. Mathur: Department of Materials Science

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract Repeatable magnetization reversal under purely electrical control remains the outstanding goal in magnetoelectrics. Here we use magnetic force microscopy to study a commercially manufactured multilayer capacitor that displays strain-mediated coupling between magnetostrictive Ni electrodes and piezoelectric BaTiO3-based dielectric layers. In an electrode exposed by polishing approximately normal to the layers, we find a perpendicularly magnetized feature that exhibits non-volatile electrically driven repeatable magnetization reversal with no applied magnetic field. Using micromagnetic modelling, we interpret this nominally full magnetization reversal in terms of a dynamic precession that is triggered by strain from voltage-driven ferroelectric switching that is fast and reversible. The anisotropy field responsible for the perpendicular magnetization is reversed by the electrically driven magnetic switching, which is, therefore, repeatable. Our demonstration of non-volatile magnetic switching via volatile ferroelectric switching may inspire the design of fatigue-free devices for electric-write magnetic-read data storage.

Date: 2013
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DOI: 10.1038/ncomms2398

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