Dynamics of ferromagnetic domain walls under extreme fields

Arseni Goussev; J. M. Robbins; Valeriy Slastikov; Sergiy Vasylkevych

doi:10.1103/PhysRevB.101.020418

Dynamics of ferromagnetic domain walls under extreme fields

Arseni Goussev, J. M. Robbins, Valeriy Slastikov, Sergiy Vasylkevych

School of Mathematics & Physics

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Abstract

We report the existence of a new regime for domain wall motion in uniaxial and near-uniaxial ferromagnetic nanowires, characterised by applied magnetic fields sufficiently strong that one of the domains becomes unstable. There appears a new stable solution of the Landau-Lifshitz-Gilbert equation, describing a nonplanar domain wall moving with constant velocity and precessing with constant frequency. Even in the presence of thermal noise, the new solution can propagate for distances on the order of 500 times the field-free domain wall width before fluctuations in the unstable domain become appreciable.

Original language	English
Article number	020418(R)
Journal	Physical Review B
Volume	101
DOIs	https://doi.org/10.1103/PhysRevB.101.020418
Publication status	Published - 28 Jan 2020

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10.1103/PhysRevB.101.020418

Goussev et al AAM
Arseni Goussev, J. M. Robbins, Valeriy Slastikov, and Sergiy Vasylkevych. 'Dynamics of ferromagnetic domain walls under extreme fields.' Phys. Rev. B 101, 020418(R). © 2020 American Physical Society. All rights reserved.
Accepted author manuscript (Post-print), 1.72 MB

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abstract = "We report the existence of a new regime for domain wall motion in uniaxial and near-uniaxial ferromagnetic nanowires, characterised by applied magnetic fields sufficiently strong that one of the domains becomes unstable. There appears a new stable solution of the Landau-Lifshitz-Gilbert equation, describing a nonplanar domain wall moving with constant velocity and precessing with constant frequency. Even in the presence of thermal noise, the new solution can propagate for distances on the order of 500 times the field-free domain wall width before fluctuations in the unstable domain become appreciable. ",

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AU - Robbins, J. M.

AU - Slastikov, Valeriy

AU - Vasylkevych, Sergiy

N1 - No embargo. APS.

PY - 2020/1/28

Y1 - 2020/1/28

N2 - We report the existence of a new regime for domain wall motion in uniaxial and near-uniaxial ferromagnetic nanowires, characterised by applied magnetic fields sufficiently strong that one of the domains becomes unstable. There appears a new stable solution of the Landau-Lifshitz-Gilbert equation, describing a nonplanar domain wall moving with constant velocity and precessing with constant frequency. Even in the presence of thermal noise, the new solution can propagate for distances on the order of 500 times the field-free domain wall width before fluctuations in the unstable domain become appreciable.

AB - We report the existence of a new regime for domain wall motion in uniaxial and near-uniaxial ferromagnetic nanowires, characterised by applied magnetic fields sufficiently strong that one of the domains becomes unstable. There appears a new stable solution of the Landau-Lifshitz-Gilbert equation, describing a nonplanar domain wall moving with constant velocity and precessing with constant frequency. Even in the presence of thermal noise, the new solution can propagate for distances on the order of 500 times the field-free domain wall width before fluctuations in the unstable domain become appreciable.

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DO - 10.1103/PhysRevB.101.020418

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JO - Physical Review B

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Dynamics of ferromagnetic domain walls under extreme fields

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