6533b857fe1ef96bd12b4dea

RESEARCH PRODUCT

Local control of domain wall dynamics in ferromagnetic rings

Andrea KroneMarkus WeigandBenjamin KrügerMathias KlaeuiHermann StollM. MawassK. RichterGisela Schütz

subject

PhysicsDomain wall (magnetism)Condensed matter physicsMagnetic domainSingle domainMagnetic susceptibilityMicromagneticsMagnetic fluxMagnetic fieldVortex

description

Ferromagnetic nanorings are of great interest due to prospective applications in memory and logic devices based on domain wall (DW) motion.1-3A key-prerequisite for their realization is a reproducible domain wall spin structure with a well-controllable wall velocity. We have found that DW propagation in magnetic ring is characterized by non-constant vortex DW velocity even below Walker breakdown4 (as opposed to straight wires). Several studies have been devoted to the optimization of ring reversal on a global scale using out-of plane field5 or flux charges emanating from neighboring rings if placed in close proximity6. However, these methods involve DW pinning and vortex nucleation processes, which are sensitive to thermal activation.

yearjournalcountryeditionlanguage
2015-05-012015 IEEE Magnetics Conference (INTERMAG)
https://doi.org/10.1109/intmag.2015.7157065