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

32 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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10.1063/1.5102132

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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",

note = "Publisher Copyright: {\textcopyright} 2019 Author(s).",

year = "2019",

month = sep,

day = "16",

doi = "10.1063/1.5102132",

language = "English",

volume = "115",

journal = "Applied Physics Letters",

issn = "0003-6951",

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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 - https://www.scopus.com/pages/publications/85072530237

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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