Fast spin-wave-mediated magnetic vortex core reversal

Matthias Kammerer; Hermann Stoll; Matthias Noske; Markus Sproll; Markus Weigand; Christian Illg; Georg Woltersdorf; Manfred Fähnle; Christian Back; Gisela Schütz

doi:10.1103/PhysRevB.86.134426

Fast spin-wave-mediated magnetic vortex core reversal

Matthias Kammerer, Hermann Stoll, Matthias Noske, Markus Sproll, Markus Weigand, Christian Illg, Georg Woltersdorf, Manfred Fähnle, Christian Back, Gisela Schütz

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

42 Scopus citations

Abstract

Spin-wave-mediated vortex core reversal is investigated using x-ray magnetic circular dichroism in a time-resolved scanning transmission x-ray microscope in combination with micromagnetic simulations. The evolution of magnetization dynamics in Permalloy disks is imaged after excitation with one-period rotating rf-field bursts. Selective unidirectional switching of the vortex polarity is achieved due to different switching thresholds for clockwise and counterclockwise excitations. A lower limit of about 200 ps for the unidirectional switching time after the onset of a one-period burst is found for the geometry of our disks (1.6μm in diameter and 50 nm in thickness).

Original language	English
Article number	134426
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	86
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.86.134426
State	Published - 25 Oct 2012
Externally published	Yes

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10.1103/PhysRevB.86.134426

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abstract = "Spin-wave-mediated vortex core reversal is investigated using x-ray magnetic circular dichroism in a time-resolved scanning transmission x-ray microscope in combination with micromagnetic simulations. The evolution of magnetization dynamics in Permalloy disks is imaged after excitation with one-period rotating rf-field bursts. Selective unidirectional switching of the vortex polarity is achieved due to different switching thresholds for clockwise and counterclockwise excitations. A lower limit of about 200 ps for the unidirectional switching time after the onset of a one-period burst is found for the geometry of our disks (1.6μm in diameter and 50 nm in thickness).",

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AU - Kammerer, Matthias

AU - Stoll, Hermann

AU - Noske, Matthias

AU - Sproll, Markus

AU - Weigand, Markus

AU - Illg, Christian

AU - Woltersdorf, Georg

AU - Fähnle, Manfred

AU - Back, Christian

AU - Schütz, Gisela

PY - 2012/10/25

Y1 - 2012/10/25

N2 - Spin-wave-mediated vortex core reversal is investigated using x-ray magnetic circular dichroism in a time-resolved scanning transmission x-ray microscope in combination with micromagnetic simulations. The evolution of magnetization dynamics in Permalloy disks is imaged after excitation with one-period rotating rf-field bursts. Selective unidirectional switching of the vortex polarity is achieved due to different switching thresholds for clockwise and counterclockwise excitations. A lower limit of about 200 ps for the unidirectional switching time after the onset of a one-period burst is found for the geometry of our disks (1.6μm in diameter and 50 nm in thickness).

AB - Spin-wave-mediated vortex core reversal is investigated using x-ray magnetic circular dichroism in a time-resolved scanning transmission x-ray microscope in combination with micromagnetic simulations. The evolution of magnetization dynamics in Permalloy disks is imaged after excitation with one-period rotating rf-field bursts. Selective unidirectional switching of the vortex polarity is achieved due to different switching thresholds for clockwise and counterclockwise excitations. A lower limit of about 200 ps for the unidirectional switching time after the onset of a one-period burst is found for the geometry of our disks (1.6μm in diameter and 50 nm in thickness).

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JO - Physical Review B - Condensed Matter and Materials Physics

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Fast spin-wave-mediated magnetic vortex core reversal

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