Magnetization dynamics of imprinted non-collinear spin textures

Journal Article · Mon Sep 14 04:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4931101· OSTI ID:22482090

Streubel, Robert; Kopte, Martin; Makarov, Denys ^[1]; Fischer, Peter ^[2]; Schmidt, Oliver G. ^[1]

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1. Institute for Integrative Nanosciences, IFW Dresden, 01069 Dresden (Germany)
2. Center for X-Ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

We study the magnetization dynamics of non-collinear spin textures realized via imprint of the magnetic vortex state in soft permalloy into magnetically hard out-of-plane magnetized Co/Pd nanopatterned heterostructures. Tuning the interlayer exchange coupling between soft- and hard-magnetic subsystems provides means to tailor the magnetic state in the Co/Pd stack from being vortex- to donut-like with different core sizes. While the imprinted vortex spin texture leads to the dynamics similar to the one observed for vortices in permalloy disks, the donut-like state causes the appearance of two gyrofrequencies characteristic of the early and later stages of the magnetization dynamics. The dynamics are described using the Thiele equation supported by the full scale micromagnetic simulations by taking into account an enlarged core size of the donut states compared to magnetic vortices.

• OSTI ID: 22482090
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 11 Vol. 107; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EQUATIONS
GYROFREQUENCY
MAGNETIC FLUX
MAGNETIZATION
PERMALLOY
SIMULATION
SPIN
TEXTURE