Interfacial Dzyaloshinskii-Moriya interaction studied by time-resolved scanning Kerr microscopy

H. S. Körner; J. Stigloher; H. G. Bauer; H. Hata; T. Taniguchi; T. Moriyama; T. Ono; C. H. Back

doi:10.1103/PhysRevB.92.220413

Interfacial Dzyaloshinskii-Moriya interaction studied by time-resolved scanning Kerr microscopy

H. S. Körner, J. Stigloher, H. G. Bauer, H. Hata, T. Taniguchi, T. Moriyama, T. Ono, C. H. Back

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

21 Scopus citations

Abstract

We investigate the influence of the interfacial Dzyaloshinskii-Moriya interaction (DMI) on the propagation of Damon-Eshbach spin waves in micrometer-sized Pt(2 nm)/Co(0.4 nm)/Py(5 nm)/MgO(5 nm) stripes. We use time-resolved scanning Kerr microscopy to image the spin waves excited by a microwave antenna and to directly access their dispersion. The presence of an interfacial DMI manifests itself in an asymmetry in the dispersion for counterpropagating spin waves which reverses sign upon reversal of the direction of the externally applied magnetic field. From this asymmetry we deduce the strength of the interfacial DMI. Micromagnetic simulations confirm that the observed difference in the wave numbers and the signature of the asymmetry are characteristic for the occurrence of an interfacial DMI at the Pt/Co interface and cannot be explained by the uniaxial perpendicular magnetic anisotropy field originating from the same interface.

Original language	English
Article number	220413
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	92
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.92.220413
State	Published - 17 Dec 2015
Externally published	Yes

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10.1103/PhysRevB.92.220413

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title = "Interfacial Dzyaloshinskii-Moriya interaction studied by time-resolved scanning Kerr microscopy",

abstract = "We investigate the influence of the interfacial Dzyaloshinskii-Moriya interaction (DMI) on the propagation of Damon-Eshbach spin waves in micrometer-sized Pt(2 nm)/Co(0.4 nm)/Py(5 nm)/MgO(5 nm) stripes. We use time-resolved scanning Kerr microscopy to image the spin waves excited by a microwave antenna and to directly access their dispersion. The presence of an interfacial DMI manifests itself in an asymmetry in the dispersion for counterpropagating spin waves which reverses sign upon reversal of the direction of the externally applied magnetic field. From this asymmetry we deduce the strength of the interfacial DMI. Micromagnetic simulations confirm that the observed difference in the wave numbers and the signature of the asymmetry are characteristic for the occurrence of an interfacial DMI at the Pt/Co interface and cannot be explained by the uniaxial perpendicular magnetic anisotropy field originating from the same interface.",

author = "K{\"o}rner, {H. S.} and J. Stigloher and Bauer, {H. G.} and H. Hata and T. Taniguchi and T. Moriyama and T. Ono and Back, {C. H.}",

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doi = "10.1103/PhysRevB.92.220413",

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T1 - Interfacial Dzyaloshinskii-Moriya interaction studied by time-resolved scanning Kerr microscopy

AU - Körner, H. S.

AU - Stigloher, J.

AU - Bauer, H. G.

AU - Hata, H.

AU - Taniguchi, T.

AU - Moriyama, T.

AU - Ono, T.

AU - Back, C. H.

PY - 2015/12/17

Y1 - 2015/12/17

N2 - We investigate the influence of the interfacial Dzyaloshinskii-Moriya interaction (DMI) on the propagation of Damon-Eshbach spin waves in micrometer-sized Pt(2 nm)/Co(0.4 nm)/Py(5 nm)/MgO(5 nm) stripes. We use time-resolved scanning Kerr microscopy to image the spin waves excited by a microwave antenna and to directly access their dispersion. The presence of an interfacial DMI manifests itself in an asymmetry in the dispersion for counterpropagating spin waves which reverses sign upon reversal of the direction of the externally applied magnetic field. From this asymmetry we deduce the strength of the interfacial DMI. Micromagnetic simulations confirm that the observed difference in the wave numbers and the signature of the asymmetry are characteristic for the occurrence of an interfacial DMI at the Pt/Co interface and cannot be explained by the uniaxial perpendicular magnetic anisotropy field originating from the same interface.

AB - We investigate the influence of the interfacial Dzyaloshinskii-Moriya interaction (DMI) on the propagation of Damon-Eshbach spin waves in micrometer-sized Pt(2 nm)/Co(0.4 nm)/Py(5 nm)/MgO(5 nm) stripes. We use time-resolved scanning Kerr microscopy to image the spin waves excited by a microwave antenna and to directly access their dispersion. The presence of an interfacial DMI manifests itself in an asymmetry in the dispersion for counterpropagating spin waves which reverses sign upon reversal of the direction of the externally applied magnetic field. From this asymmetry we deduce the strength of the interfacial DMI. Micromagnetic simulations confirm that the observed difference in the wave numbers and the signature of the asymmetry are characteristic for the occurrence of an interfacial DMI at the Pt/Co interface and cannot be explained by the uniaxial perpendicular magnetic anisotropy field originating from the same interface.

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U2 - 10.1103/PhysRevB.92.220413

DO - 10.1103/PhysRevB.92.220413

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 22

M1 - 220413

ER -

Interfacial Dzyaloshinskii-Moriya interaction studied by time-resolved scanning Kerr microscopy

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