title: High domain wall velocities via spin transfer torque using vertical current injection.
abstract: Domain walls, nanoscale transition regions separating oppositely oriented ferromagnetic domains, have significant promise for use in spintronic devices for data storage and memristive applications. The state of these devices is related to the wall position and thus rapid operation will require a controllable onset of domain wall motion and high speed wall displacement. These processes are traditionally driven by spin transfer torque due to lateral injection of spin polarized current through a ferromagnetic nanostrip. However, this geometry is often hampered by low maximum wall velocities and/or a need for prohibitively high current densities. Here, using time-resolved magnetotransport measurements, we show that vertical injection of spin currents through a magnetic tunnel junction can drive domain walls over hundreds of nanometers at ~500 m/s using current densities on the order of 6 MA/cm(2). Moreover, these measurements provide information about the stochastic and deterministic aspects of current driven domain wall mediated switching.
authors.affiliation: Unité Mixte de Physique CNRS/Thales and Université Paris-Sud 11, 1 Ave. A. Fresnel, 91767 Palaiseau, France. peter.metaxas@uwa.edu.au
authors.forename: Peter J
authors.initials: PJ
authors.lastname: Metaxas
authors.forename: Joao
authors.initials: J
authors.lastname: Sampaio
authors.forename: André
authors.initials: A
authors.lastname: Chanthbouala
authors.forename: Rie
authors.initials: R
authors.lastname: Matsumoto
authors.forename: Abdelmadjid
authors.initials: A
authors.lastname: Anane
authors.forename: Albert
authors.initials: A
authors.lastname: Fert
authors.forename: Konstantin A
authors.initials: KA
authors.lastname: Zvezdin
authors.forename: Kay
authors.initials: K
authors.lastname: Yakushiji
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Kubota
authors.forename: Akio
authors.initials: A
authors.lastname: Fukushima
authors.forename: Shinji
authors.initials: S
authors.lastname: Yuasa
authors.forename: Kazumasa
authors.initials: K
authors.lastname: Nishimura
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Nagamine
authors.forename: Hiroki
authors.initials: H
authors.lastname: Maehara
authors.forename: Koji
authors.initials: K
authors.lastname: Tsunekawa
authors.forename: Vincent
authors.initials: V
authors.lastname: Cros
authors.forename: Julie
authors.initials: J
authors.lastname: Grollier
mesh_terms: D003198:Computer Simulation; D016247:Information Storage and Retrieval; D008280:Magnetics; D059346:Magnets / Q000737:chemistry*; D036103:Nanotechnology; D013113:Spin Labels; D019415:Torque
chemical_list: D013113:Spin Labels