Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers

We report on reversible electric-field-driven magnetic domain wall motion in a Cu/Ni multilayer on a ferroelectric BaTiO3 substrate. In our heterostructure, strain-coupling to ferroelastic domains with in-plane and perpendicular polarization in the BaTiO3 substrate causes the for...

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Main Authors:	Diego López González, Yasuhiro Shirahata, Ben Van de Wiele, Kévin J. A. Franke, Arianna Casiraghi, Tomoyasu Taniyama, Sebastiaan van Dijken
Format:	Article
Language:	English
Published:	AIP Publishing LLC 2017-03-01
Series:	AIP Advances
Online Access:	http://dx.doi.org/10.1063/1.4979267

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author	Diego López González Yasuhiro Shirahata Ben Van de Wiele Kévin J. A. Franke Arianna Casiraghi Tomoyasu Taniyama Sebastiaan van Dijken
author_facet	Diego López González Yasuhiro Shirahata Ben Van de Wiele Kévin J. A. Franke Arianna Casiraghi Tomoyasu Taniyama Sebastiaan van Dijken
author_sort	Diego López González
collection	DOAJ
description	We report on reversible electric-field-driven magnetic domain wall motion in a Cu/Ni multilayer on a ferroelectric BaTiO3 substrate. In our heterostructure, strain-coupling to ferroelastic domains with in-plane and perpendicular polarization in the BaTiO3 substrate causes the formation of domains with perpendicular and in-plane magnetic anisotropy, respectively, in the Cu/Ni multilayer. Walls that separate magnetic domains are elastically pinned onto ferroelectric domain walls. Using magneto-optical Kerr effect microscopy, we demonstrate that out-of-plane electric field pulses across the BaTiO3 substrate move the magnetic and ferroelectric domain walls in unison. Our experiments indicate an exponential increase of domain wall velocity with electric field strength and opposite domain wall motion for positive and negative field pulses. The application of a magnetic field does not affect the velocity of magnetic domain walls, but independently tailors their internal spin structure, causing a change in domain wall dynamics at high velocities.
first_indexed	2024-12-21T13:42:10Z
format	Article
id	doaj.art-36e1ffb3ef48490a8bcdd894c6fe915b
institution	Directory Open Access Journal
issn	2158-3226
language	English
last_indexed	2024-12-21T13:42:10Z
publishDate	2017-03-01
publisher	AIP Publishing LLC
record_format	Article
series	AIP Advances
spelling	doaj.art-36e1ffb3ef48490a8bcdd894c6fe915b2022-12-21T19:01:58ZengAIP Publishing LLCAIP Advances2158-32262017-03-0173035119035119-610.1063/1.4979267058703ADVElectric-field-driven domain wall dynamics in perpendicularly magnetized multilayersDiego López González0Yasuhiro Shirahata1Ben Van de Wiele2Kévin J. A. Franke3Arianna Casiraghi4Tomoyasu Taniyama5Sebastiaan van Dijken6NanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, FinlandMaterials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, JapanDepartment of Electrical Energy, Systems and Automation, Ghent University, Ghent B-9000, BelgiumNanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, FinlandNanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, FinlandMaterials and Structures Laboratory, Tokyo Institute of Technology, Yokohama, JapanNanoSpin, Department of Applied Physics, Aalto University School of Science, P.O. Box 15100, FI-00076 Aalto, FinlandWe report on reversible electric-field-driven magnetic domain wall motion in a Cu/Ni multilayer on a ferroelectric BaTiO3 substrate. In our heterostructure, strain-coupling to ferroelastic domains with in-plane and perpendicular polarization in the BaTiO3 substrate causes the formation of domains with perpendicular and in-plane magnetic anisotropy, respectively, in the Cu/Ni multilayer. Walls that separate magnetic domains are elastically pinned onto ferroelectric domain walls. Using magneto-optical Kerr effect microscopy, we demonstrate that out-of-plane electric field pulses across the BaTiO3 substrate move the magnetic and ferroelectric domain walls in unison. Our experiments indicate an exponential increase of domain wall velocity with electric field strength and opposite domain wall motion for positive and negative field pulses. The application of a magnetic field does not affect the velocity of magnetic domain walls, but independently tailors their internal spin structure, causing a change in domain wall dynamics at high velocities.http://dx.doi.org/10.1063/1.4979267
spellingShingle	Diego López González Yasuhiro Shirahata Ben Van de Wiele Kévin J. A. Franke Arianna Casiraghi Tomoyasu Taniyama Sebastiaan van Dijken Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers AIP Advances
title	Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers
title_full	Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers
title_fullStr	Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers
title_full_unstemmed	Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers
title_short	Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers
title_sort	electric field driven domain wall dynamics in perpendicularly magnetized multilayers
url	http://dx.doi.org/10.1063/1.4979267
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Electric-field-driven domain wall dynamics in perpendicularly magnetized multilayers

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