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Creep turns linear in narrow ferromagnetic nanostrips

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Abstract
The motion of domain walls in magnetic materials is a typical example of a creep process, usually characterised by a stretched exponential velocity-force relation. By performing large-scale micromagnetic simulations, and analyzing an extended 1D model which takes the effects of finite temperatures and material defects into account, we show that this creep scaling law breaks down in sufficiently narrow ferromagnetic strips. Our analysis of current-driven transverse domain wall motion in disordered Permalloy nanostrips reveals instead a creep regime with a linear dependence of the domain wall velocity on the applied field or current density. This originates from the essentially point-like nature of domain walls moving in narrow, line- like disordered nanostrips. An analogous linear relation is found also by analyzing existing experimental data on field-driven domain wall motion in perpendicularly magnetised media.
Keywords
MOTION, PERPENDICULAR ANISOTROPY, MEMORY, UNIVERSALITY, FLUCTUATIONS, TEMPERATURE, RACETRACK, NANOWIRES, STRIPS, DOMAIN-WALL DYNAMICS

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Chicago
Leliaert, Jonathan, Ben Van de Wiele, Arne Vansteenkiste, Lasse Laurson, Gianfranco Durin, Luc Dupré, and Bartel Van Waeyenberge. 2016. “Creep Turns Linear in Narrow Ferromagnetic Nanostrips.” Scientific Reports 6.
APA
Leliaert, J., Van de Wiele, B., Vansteenkiste, A., Laurson, L., Durin, G., Dupré, L., & Van Waeyenberge, B. (2016). Creep turns linear in narrow ferromagnetic nanostrips. SCIENTIFIC REPORTS, 6.
Vancouver
1.
Leliaert J, Van de Wiele B, Vansteenkiste A, Laurson L, Durin G, Dupré L, et al. Creep turns linear in narrow ferromagnetic nanostrips. SCIENTIFIC REPORTS. 2016;6.
MLA
Leliaert, Jonathan, Ben Van de Wiele, Arne Vansteenkiste, et al. “Creep Turns Linear in Narrow Ferromagnetic Nanostrips.” SCIENTIFIC REPORTS 6 (2016): n. pag. Print.
@article{7040024,
  abstract     = {The motion of domain walls in magnetic materials is a typical example of a creep process, usually characterised by a stretched exponential velocity-force relation. By performing large-scale micromagnetic simulations, and analyzing an extended 1D model which takes the effects of finite temperatures and material defects into account, we show that this creep scaling law breaks down in sufficiently narrow ferromagnetic strips. Our analysis of current-driven transverse domain wall motion in disordered Permalloy nanostrips reveals instead a creep regime with a linear dependence of the domain wall velocity on the applied field or current density. This originates from the essentially point-like nature of domain walls moving in narrow, line- like disordered nanostrips. An analogous linear relation is found also by analyzing existing experimental data on field-driven domain wall motion in perpendicularly magnetised media.},
  articleno    = {20472},
  author       = {Leliaert, Jonathan and Van de Wiele, Ben and Vansteenkiste, Arne and Laurson, Lasse and Durin, Gianfranco and Dupr{\'e}, Luc and Van Waeyenberge, Bartel},
  issn         = {2045-2322},
  journal      = {SCIENTIFIC REPORTS},
  keyword      = {MOTION,PERPENDICULAR ANISOTROPY,MEMORY,UNIVERSALITY,FLUCTUATIONS,TEMPERATURE,RACETRACK,NANOWIRES,STRIPS,DOMAIN-WALL DYNAMICS},
  language     = {eng},
  pages        = {9},
  title        = {Creep turns linear in narrow ferromagnetic nanostrips},
  url          = {http://dx.doi.org/10.1038/srep20472},
  volume       = {6},
  year         = {2016},
}

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