Skyrmion elongation, duplication, and rotation by spin-transfer torque under spatially varying spin current

Duijn, Floris van; Osca, Javier; Sorée, Bart

doi:10.1103/physrevb.104.094426

Cited by 1 publication

(2 citation statements)

References 22 publications

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“…The size λ = λxλy as well as the width and length λx and λy are computed using Eqs. (19) and Eqs. (21) .…”

Section: Elliptical Skyrmion Creationmentioning

confidence: 99%

“…Typically, skyrmions stabilized by the DMI have an isotropic circular shape, see for instance 131415161718 . When the DMI is isotropic, Dujin et al 19 have found that Bloch skyrmions elongated by the spin-transfer torque returned to the isotropic circular state. Lin et al 20 showed that skyrmions can be deformed depending upon the skyrmion's internal modes.…”

Section: Introductionmentioning

confidence: 99%

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Elliptical skyrmions: theory and nucleation by a magnetic tip in an antiskyrmion-hosting material

Capic

2022

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Motivated by experimental findings in [ 1 ] and [ 2 ], we find an elliptical skyrmion can be nucleated in a material with a Dzyaloshinskii-Moriya interaction (DMI) that supports antiskyrmions. The DMI favors the elongation of the skyrmion along a given direction so that it is characterized by two size parameters. We derive analytical properties of the elliptical skyrmion using the Belavin-Polyakov (BP) pure exchange model. We show that the DMI which typically favors isotropic skyrmions or antiskyrmions, respectively, can also support elliptical antiskyrmions or skyrmions, respectively. Using the real material parameters extracted from 1 and including all relevant interactions, numerical computations indicate that the elliptical skyrmion can be nucleated from the stripe or labyrinth domain state by a magnetic force microscope tip in a thin film with a DMI favoring antiskyrmions that consists of at least a few atomic layers.

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“…The size λ = λxλy as well as the width and length λx and λy are computed using Eqs. (19) and Eqs. (21) .…”

Section: Elliptical Skyrmion Creationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Elliptical skyrmions: theory and nucleation by a magnetic tip in an antiskyrmion-hosting material

Capic

2022

Preprint

View full text Add to dashboard Cite

show abstract

Skyrmion elongation, duplication, and rotation by spin-transfer torque under spatially varying spin current

Cited by 1 publication

References 22 publications

Elliptical skyrmions: theory and nucleation by a magnetic tip in an antiskyrmion-hosting material

Elliptical skyrmions: theory and nucleation by a magnetic tip in an antiskyrmion-hosting material

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