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Skyrmionium - high velocity without the skyrmion Hall effect.

ABSTRACT: The lateral motion of a magnetic skyrmion, arising because of the skyrmion Hall effect, imposes a number of restrictions on the use of this spin state in the racetrack memory. A skyrmionium is a more promising spin texture for memory applications, since it has zero total topological charge and propagates strictly along a nanotrack. Here, the stability of the skyrmionium, as well as the dependence of its size on the magnetic parameters, such as the Dzyaloshinskii-Moriya interaction and perpendicular magnetic anisotropy, are studied by means of micromagnetic simulations. We propose an advanced method for the skyrmionium nucleation due to a local enhancement of the spin Hall effect. The stability of the skyrmionium being in motion under the action of the spin polarized current is analyzed.

SUBMITTER: Kolesnikov AG

PROVIDER: S-EPMC6240074 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature

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Skyrmionium - high velocity without the skyrmion Hall effect.

Kolesnikov Alexander G AG Stebliy Maksim E ME Samardak Alexander S AS Ognev Alexey V AV

Scientific reports 20181116 1

The lateral motion of a magnetic skyrmion, arising because of the skyrmion Hall effect, imposes a number of restrictions on the use of this spin state in the racetrack memory. A skyrmionium is a more promising spin texture for memory applications, since it has zero total topological charge and propagates strictly along a nanotrack. Here, the stability of the skyrmionium, as well as the dependence of its size on the magnetic parameters, such as the Dzyaloshinskii-Moriya interaction and perpendicu ...[more]

PMID: 30446670

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