Direct observation of Oersted-field-induced magnetization dynamics in magnetic nanostripes

Abstract

We have used time-resolved x-ray photoemission electron microscopy to investigate the magnetization dynamics induced by nanosecond current pulses in NiFe/Cu/Co nanostripes. A large tilt of the NiFe magnetization in the direction transverse to the stripe is observed during the pulses. We show that this effect cannot be quantitatively understood from the amplitude of the Oersted field and the shape anisotropy. High frequency oscillations observed at the onset of the pulses are attributed to precessional motion of the NiFe magnetization about the effective field. We discuss the possible origins of the large magnetization tilt and the potential implications of the static and dynamic effects of the Oersted field on current-induced domain wall motion in such stripes.

Published in Phys. Rev. B 83, 020406 (2011) (Rapid Communications)

References in corpus (5)

• Real-space observation of current-driven domain wall motion in submicron magnetic wires
• Switching a spin-valve back and forth by current-induced domain wall motion
• Direct observation of domain-wall configurations transformed by spin currents
• Phase Coherent Precessional Magnetization Reversal in Micro-scopic Spin Valve Elements
• High domain wall velocity at zero magnetic field induced by low current densities in spin-valve nanostripes

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• Resonant translational, breathing and twisting modes of pinned transverse magnetic domain walls
• Helitronics for classical and unconventional computing
• Current-induced switching of YIG/Pt bilayers with in-plane magnetization due to Oersted fields
• Phase diagram of magnetic domain walls in spin valve nano-stripes
• Ultra-high differential mobility and velocity of Néel walls in spin valves with planar-transverse polarizers under low perpendicularly injected currents
• Current distribution in metallic multilayers from resistance measurements
• A Platform for Addressing Individual Magnetite Islands Grown Epitaxially on Ru(0001) and Manipulating Their Magnetic Domains
• Current-induced magnetization reversal in pseudo spin valves in current-in-plane configuration