Current-excited magnetization dynamics in narrow ferromagnetic wires

Abstract

We investigate the current-excited magnetization dynamics in a narrow ferromagnetic Permalloy wire by means of Lorentz microscopy, together with the results of simultaneous transport measurements. A detailed structural evolution of the magnetization is presented as a function of the applied current density. Local structural deformation, bidirectional displacement, and magnetization reversal are found below the Curie temperature with increasing the current density. We discuss probable mechanisms of observed features of the current-excited magnetization dynamics.

11 pages, 2 figures, 3 videos, accepted in Japanese Journal of Applied Physics (Express Letters)

References in corpus (13)

• Roles of non-equilibrium conduction electrons on magnetization dynamics of ferromagnets
• Micromagnetic understanding of current-driven domain wall motion in patterned nanowires
• Real-space observation of current-driven domain wall motion in submicron magnetic wires
• Theory of Current-Driven Domain Wall Motion: A Poorman's Approach
• Modification of the Landau-Lifshitz Equation in the Presence of a Spin-Polarized Current in CMR and GMR Materials
• Direct observation of domain-wall configurations transformed by spin currents
• Domain wall propagation in magnetic nanowires by spin polarized current injection
• Current-spin coupling for ferromagnetic domain walls in fine wires
• Effect of Joule heating in current-driven domain wall motion
• Current induced distortion of a magnetic domain wall
• Influence of a Uniform Current on Collective Magnetization Dynamics in a Ferromagnetic Metal
• Effect of Spin Current on Uniform Ferromagnetism: Domain Nucleation
• Dynamics of a domain wall and spin-wave excitations driven by a mesoscopic current

Cited by in corpus (8)

• Microscopic approach to current-driven domain wall dynamics
• Control of Domain Wall Position by Electrical Current in Structured Co/Ni Wire with Perpendicular Magnetic Anisotropy
• STT-SNN: A Spin-Transfer-Torque Based Soft-Limiting Non-Linear Neuron for Low-Power Artificial Neural Networks
• Theory of Domain Wall Dynamics under Current
• Dynamical pinning of domain wall in magnetic nanowire induced by Walker breakdown
• Domain Nucleation and Annihilation in Uniformly Magnetized State under Current Pulses in Narrow Ferromagnetic Wires
• Metastable magnetic domain wall dynamics
• Observation of magnetic domains in uniaxial magnets via small-angle electron diffraction and Foucault imaging