Scaling Behaviour of Chirality Dependent Domain Wall Pinning in Planar Nanowires

• Authors: D. Eastwood , L. Bogart , D. Atkinson
• Languages of publication: EN

Abstracts

EN

Micromagnetic modelling is used to establish the dimensional scaling dependence of the magnetic fields required for domain wall injection and chirality dependent pinning in planar permalloy nanowires with asymmetric structural notches. The wire width, thickness and notch constriction width are systematically varied whilst the axial magnetization is reversed under a globally applied magnetic field. A component of magnetic field transverse to the direction of propagation is applied throughout the reversal to control the domain wall chirality, and therefore determine the strength of pinning at the notch. We deduce that thicker wires with a narrower width cause larger depinning fields and stronger chirality dependent pinning, an observation relevant for domain wall memory applications, and particularly those exploiting chirality dependent pinning in nanowires.

Keywords

EN

75.60.Ch; 75.78.Cd; 81.07.Gf

Discipline

• 81.07.Gf: Nanowires
• 75.60.Ch: Domain walls and domain structure(for magnetic bubbles and vortices, see 75.70.Kw)
• 75.78.Cd: Micromagnetic simulations

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2010
• Volume: 118
• Issue: 5
• Pages: 719-722

Dates

published

2010-11

Contributors

author

D. Eastwood

• Department of Physics, Durham University, DH1 3LE, United Kingdom

author

L. Bogart

• Department of Physics, Durham University, DH1 3LE, United Kingdom

author

D. Atkinson

• Department of Physics, Durham University, DH1 3LE, United Kingdom

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Identifiers

DOI

10.12693/APhysPolA.118.719