Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well

Andre Bisig; Jan Rhensius; Matthias Kammerer; Michael Curcic; Hermann Stoll; Gisela Schütz; Bartel Van Waeyenberge; Kang Wei Chou; Tolek Tyliszczak; Laura J. Heyderman; Stephen Krzyk; Arndt Von Bieren; Mathias Kläui

doi:10.1063/1.3373590

Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well

Andre Bisig, Jan Rhensius, Matthias Kammerer, Michael Curcic, Hermann Stoll, Gisela Schütz, Bartel Van Waeyenberge, Kang Wei Chou, Tolek Tyliszczak, Laura J. Heyderman, Stephen Krzyk, Arndt Von Bieren, Mathias Kläui

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Employing time-resolved x-ray microscopy, we investigate the dynamics of a pinned magnetic vortex domain wall in a magnetic nanowire. The gyrotropic motion of the vortex core is imaged in response to an exciting ac current. The elliptical vortex core trajectory at resonance reveals asymmetries in the local potential well that are correlated with the pinning geometry. Using the analytical model of a two-dimensional harmonic oscillator, we determine the resonance frequency of the vortex core gyration and, from the eccentricity of the vortex core trajectory at resonance, we can deduce the stiffness of the local potential well.

Original language	English
Article number	152506
Journal	Applied Physics Letters
Volume	96
Issue number	15
DOIs	https://doi.org/10.1063/1.3373590
State	Published - 12 Apr 2010
Externally published	Yes

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title = "Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well",

abstract = "Employing time-resolved x-ray microscopy, we investigate the dynamics of a pinned magnetic vortex domain wall in a magnetic nanowire. The gyrotropic motion of the vortex core is imaged in response to an exciting ac current. The elliptical vortex core trajectory at resonance reveals asymmetries in the local potential well that are correlated with the pinning geometry. Using the analytical model of a two-dimensional harmonic oscillator, we determine the resonance frequency of the vortex core gyration and, from the eccentricity of the vortex core trajectory at resonance, we can deduce the stiffness of the local potential well.",

author = "Andre Bisig and Jan Rhensius and Matthias Kammerer and Michael Curcic and Hermann Stoll and Gisela Sch{\"u}tz and {Van Waeyenberge}, Bartel and Chou, {Kang Wei} and Tolek Tyliszczak and Heyderman, {Laura J.} and Stephen Krzyk and {Von Bieren}, Arndt and Mathias Kl{\"a}ui",

year = "2010",

month = apr,

day = "12",

doi = "10.1063/1.3373590",

language = "English",

volume = "96",

journal = "Applied Physics Letters",

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T1 - Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well

AU - Bisig, Andre

AU - Rhensius, Jan

AU - Kammerer, Matthias

AU - Curcic, Michael

AU - Stoll, Hermann

AU - Schütz, Gisela

AU - Van Waeyenberge, Bartel

AU - Chou, Kang Wei

AU - Tyliszczak, Tolek

AU - Heyderman, Laura J.

AU - Krzyk, Stephen

AU - Von Bieren, Arndt

AU - Kläui, Mathias

PY - 2010/4/12

Y1 - 2010/4/12

N2 - Employing time-resolved x-ray microscopy, we investigate the dynamics of a pinned magnetic vortex domain wall in a magnetic nanowire. The gyrotropic motion of the vortex core is imaged in response to an exciting ac current. The elliptical vortex core trajectory at resonance reveals asymmetries in the local potential well that are correlated with the pinning geometry. Using the analytical model of a two-dimensional harmonic oscillator, we determine the resonance frequency of the vortex core gyration and, from the eccentricity of the vortex core trajectory at resonance, we can deduce the stiffness of the local potential well.

AB - Employing time-resolved x-ray microscopy, we investigate the dynamics of a pinned magnetic vortex domain wall in a magnetic nanowire. The gyrotropic motion of the vortex core is imaged in response to an exciting ac current. The elliptical vortex core trajectory at resonance reveals asymmetries in the local potential well that are correlated with the pinning geometry. Using the analytical model of a two-dimensional harmonic oscillator, we determine the resonance frequency of the vortex core gyration and, from the eccentricity of the vortex core trajectory at resonance, we can deduce the stiffness of the local potential well.

UR - http://www.scopus.com/inward/record.url?scp=77951609859&partnerID=8YFLogxK

U2 - 10.1063/1.3373590

DO - 10.1063/1.3373590

M3 - Article

AN - SCOPUS:77951609859

SN - 0003-6951

VL - 96

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 15

M1 - 152506

ER -

Direct imaging of current induced magnetic vortex gyration in an asymmetric potential well

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