Spin-wave propagation in metallic co25fe75 films determined by microfocused frequency-resolved magneto-optic kerr effect

Lukas Liensberger; Luis Flacke; David Rogerson; Matthias Althammer; Rudolf Gross; Mathias Weiler

doi:10.1109/LMAG.2019.2918755

Spin-wave propagation in metallic co₂₅fe₇₅ films determined by microfocused frequency-resolved magneto-optic kerr effect

Lukas Liensberger, Luis Flacke, David Rogerson, Matthias Althammer, Rudolf Gross, Mathias Weiler

Chair of Technical Physics

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

4 Scopus citations

Abstract

We investigated the magnetization dynamics of a patterned Co₂₅Fe₇₅-based heterostructure with a novel optical measurement technique that we call microfocused frequency-resolved magneto-optic Kerr effect. We measured the magnetic field dependence of the dynamical spin-wave susceptibility and recorded a spatial map of the spin waves excited by a microwave antenna. We compare these results to those obtained on the same sample with the established microfocused Brillouin light scattering technique. With both techniques, we find a spin-wave propagation length of 5.6 μm at 10 GHz. We also measured the dispersion of the wave vector and the spin-wave propagation length as a function of the external magnetic field. These results are in good agreement with the existing literature and with the Kalinikos-Slavin model.

Original language	English
Article number	8721069
Journal	IEEE Magnetics Letters
Volume	10
DOIs	https://doi.org/10.1109/LMAG.2019.2918755
State	Published - 2019

Keywords

Magnetic films
Magnetic measurements
Magnetization dynamics
Magnonics
Microwave magnetics
Patterned materials
Spintronics

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10.1109/LMAG.2019.2918755

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title = "Spin-wave propagation in metallic co25fe75 films determined by microfocused frequency-resolved magneto-optic kerr effect",

abstract = "We investigated the magnetization dynamics of a patterned Co25Fe75-based heterostructure with a novel optical measurement technique that we call microfocused frequency-resolved magneto-optic Kerr effect. We measured the magnetic field dependence of the dynamical spin-wave susceptibility and recorded a spatial map of the spin waves excited by a microwave antenna. We compare these results to those obtained on the same sample with the established microfocused Brillouin light scattering technique. With both techniques, we find a spin-wave propagation length of 5.6 μm at 10 GHz. We also measured the dispersion of the wave vector and the spin-wave propagation length as a function of the external magnetic field. These results are in good agreement with the existing literature and with the Kalinikos-Slavin model.",

keywords = "Magnetic films, Magnetic measurements, Magnetization dynamics, Magnonics, Microwave magnetics, Patterned materials, Spintronics",

author = "Lukas Liensberger and Luis Flacke and David Rogerson and Matthias Althammer and Rudolf Gross and Mathias Weiler",

note = "Publisher Copyright: {\textcopyright} 2010-2012 IEEE.",

year = "2019",

doi = "10.1109/LMAG.2019.2918755",

language = "English",

volume = "10",

journal = "IEEE Magnetics Letters",

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T1 - Spin-wave propagation in metallic co25fe75 films determined by microfocused frequency-resolved magneto-optic kerr effect

AU - Liensberger, Lukas

AU - Flacke, Luis

AU - Rogerson, David

AU - Althammer, Matthias

AU - Gross, Rudolf

AU - Weiler, Mathias

PY - 2019

Y1 - 2019

N2 - We investigated the magnetization dynamics of a patterned Co25Fe75-based heterostructure with a novel optical measurement technique that we call microfocused frequency-resolved magneto-optic Kerr effect. We measured the magnetic field dependence of the dynamical spin-wave susceptibility and recorded a spatial map of the spin waves excited by a microwave antenna. We compare these results to those obtained on the same sample with the established microfocused Brillouin light scattering technique. With both techniques, we find a spin-wave propagation length of 5.6 μm at 10 GHz. We also measured the dispersion of the wave vector and the spin-wave propagation length as a function of the external magnetic field. These results are in good agreement with the existing literature and with the Kalinikos-Slavin model.

AB - We investigated the magnetization dynamics of a patterned Co25Fe75-based heterostructure with a novel optical measurement technique that we call microfocused frequency-resolved magneto-optic Kerr effect. We measured the magnetic field dependence of the dynamical spin-wave susceptibility and recorded a spatial map of the spin waves excited by a microwave antenna. We compare these results to those obtained on the same sample with the established microfocused Brillouin light scattering technique. With both techniques, we find a spin-wave propagation length of 5.6 μm at 10 GHz. We also measured the dispersion of the wave vector and the spin-wave propagation length as a function of the external magnetic field. These results are in good agreement with the existing literature and with the Kalinikos-Slavin model.

KW - Magnetic films

KW - Magnetic measurements

KW - Magnetization dynamics

KW - Magnonics

KW - Microwave magnetics

KW - Patterned materials

KW - Spintronics

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DO - 10.1109/LMAG.2019.2918755

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JO - IEEE Magnetics Letters

JF - IEEE Magnetics Letters

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ER -

Spin-wave propagation in metallic co₂₅fe₇₅ films determined by microfocused frequency-resolved magneto-optic kerr effect

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Keywords

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