High spin-wave propagation length consistent with low damping in a metallic ferromagnet

Luis Flacke; Lukas Liensberger; Matthias Althammer; Hans Huebl; Stephan Geprägs; Katrin Schultheiss; Aleksandr Buzdakov; Tobias Hula; Helmut Schultheiss; Eric R.J. Edwards; Hans T. Nembach; Justin M. Shaw; Rudolf Gross; Mathias Weiler

doi:10.1063/1.5102132

High spin-wave propagation length consistent with low damping in a metallic ferromagnet

Luis Flacke, Lukas Liensberger, Matthias Althammer, Hans Huebl, Stephan Geprägs, Katrin Schultheiss, Aleksandr Buzdakov, Tobias Hula, Helmut Schultheiss, Eric R.J. Edwards, Hans T. Nembach, Justin M. Shaw, Rudolf Gross, Mathias Weiler

Chair of Technical Physics

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

28 Scopus citations

Abstract

We report ultralow intrinsic magnetic damping in Co₂₅Fe₇₅ heterostructures, reaching the low 10^-4 regime at room temperature. By using a broadband ferromagnetic resonance technique in out-of-plane geometry, we extracted the dynamic magnetic properties of several Co₂₅Fe₇₅-based heterostructures with varying ferromagnetic layer thicknesses. By measuring radiative damping and spin pumping effects, we found the intrinsic damping of a 26 nm thick sample to be α 0 3.18 × 10 - 4. Furthermore, using Brillouin light scattering microscopy, we measured spin-wave propagation lengths of up to (21 ± 1) μm in a 26 nm thick Co₂₅Fe₇₅ heterostructure at room temperature, which is in excellent agreement with the measured damping.

Original language	English
Article number	122402
Journal	Applied Physics Letters
Volume	115
Issue number	12
DOIs	https://doi.org/10.1063/1.5102132
State	Published - 16 Sep 2019

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Flacke, L., Liensberger, L., Althammer, M., Huebl, H., Geprägs, S., Schultheiss, K., Buzdakov, A., Hula, T., Schultheiss, H., Edwards, E. R. J., Nembach, H. T., Shaw, J. M., Gross, R., & Weiler, M. (2019). High spin-wave propagation length consistent with low damping in a metallic ferromagnet. Applied Physics Letters, 115(12), Article 122402. https://doi.org/10.1063/1.5102132

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title = "High spin-wave propagation length consistent with low damping in a metallic ferromagnet",

abstract = "We report ultralow intrinsic magnetic damping in Co25Fe75 heterostructures, reaching the low 10-4 regime at room temperature. By using a broadband ferromagnetic resonance technique in out-of-plane geometry, we extracted the dynamic magnetic properties of several Co25Fe75-based heterostructures with varying ferromagnetic layer thicknesses. By measuring radiative damping and spin pumping effects, we found the intrinsic damping of a 26 nm thick sample to be α 0 3.18 × 10 - 4. Furthermore, using Brillouin light scattering microscopy, we measured spin-wave propagation lengths of up to (21 ± 1) μm in a 26 nm thick Co25Fe75 heterostructure at room temperature, which is in excellent agreement with the measured damping.",

author = "Luis Flacke and Lukas Liensberger and Matthias Althammer and Hans Huebl and Stephan Gepr{\"a}gs and Katrin Schultheiss and Aleksandr Buzdakov and Tobias Hula and Helmut Schultheiss and Edwards, {Eric R.J.} and Nembach, {Hans T.} and Shaw, {Justin M.} and Rudolf Gross and Mathias Weiler",

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year = "2019",

month = sep,

day = "16",

doi = "10.1063/1.5102132",

language = "English",

volume = "115",

journal = "Applied Physics Letters",

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T1 - High spin-wave propagation length consistent with low damping in a metallic ferromagnet

AU - Flacke, Luis

AU - Liensberger, Lukas

AU - Althammer, Matthias

AU - Huebl, Hans

AU - Geprägs, Stephan

AU - Schultheiss, Katrin

AU - Buzdakov, Aleksandr

AU - Hula, Tobias

AU - Schultheiss, Helmut

AU - Edwards, Eric R.J.

AU - Nembach, Hans T.

AU - Shaw, Justin M.

AU - Gross, Rudolf

AU - Weiler, Mathias

PY - 2019/9/16

Y1 - 2019/9/16

N2 - We report ultralow intrinsic magnetic damping in Co25Fe75 heterostructures, reaching the low 10-4 regime at room temperature. By using a broadband ferromagnetic resonance technique in out-of-plane geometry, we extracted the dynamic magnetic properties of several Co25Fe75-based heterostructures with varying ferromagnetic layer thicknesses. By measuring radiative damping and spin pumping effects, we found the intrinsic damping of a 26 nm thick sample to be α 0 3.18 × 10 - 4. Furthermore, using Brillouin light scattering microscopy, we measured spin-wave propagation lengths of up to (21 ± 1) μm in a 26 nm thick Co25Fe75 heterostructure at room temperature, which is in excellent agreement with the measured damping.

AB - We report ultralow intrinsic magnetic damping in Co25Fe75 heterostructures, reaching the low 10-4 regime at room temperature. By using a broadband ferromagnetic resonance technique in out-of-plane geometry, we extracted the dynamic magnetic properties of several Co25Fe75-based heterostructures with varying ferromagnetic layer thicknesses. By measuring radiative damping and spin pumping effects, we found the intrinsic damping of a 26 nm thick sample to be α 0 3.18 × 10 - 4. Furthermore, using Brillouin light scattering microscopy, we measured spin-wave propagation lengths of up to (21 ± 1) μm in a 26 nm thick Co25Fe75 heterostructure at room temperature, which is in excellent agreement with the measured damping.

UR - http://www.scopus.com/inward/record.url?scp=85072530237&partnerID=8YFLogxK

U2 - 10.1063/1.5102132

DO - 10.1063/1.5102132

M3 - Article

AN - SCOPUS:85072530237

SN - 0003-6951

VL - 115

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 12

M1 - 122402

ER -

High spin-wave propagation length consistent with low damping in a metallic ferromagnet

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