Imaging of short-wavelength spin waves in a nanometer-thick YIG/Co bilayer

Abhishek Talapatra; Huajun Qin; Frank Schulz; Lide Yao; Lukáš Flajšman; Markus Weigand; Sebastian Wintz; Sebastiaan van Dijken

doi:10.1063/5.0149583

Imaging of short-wavelength spin waves in a nanometer-thick YIG/Co bilayer

Abhishek Talapatra, Huajun Qin^*, Frank Schulz, Lide Yao, Lukáš Flajšman, Markus Weigand, Sebastian Wintz, Sebastiaan van Dijken^*

^*Corresponding author for this work

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

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Abstract

We report the imaging of short-wavelength spin waves in a continuous nanometer-thick YIG film with a Co stripe patterned on top. Dynamic dipolar coupling between the YIG film and the Co stripe lowers the spin-wave wavelength when spin waves enter the YIG/Co bilayer region from the bare YIG film, causing partial reflection at the YIG/Co edge. We use time-resolved scanning transmission x-ray microscopy to image the mode conversion process down to a wavelength of 280 nm and extract the spin-wave dispersion, decay length, and magnetic damping in the YIG/Co bilayer. We also analyze spin-wave reflection from the YIG/Co edge and its dependence on the wavelength of incoming and transmitted spin waves.

Original language	English
Article number	202404
Pages (from-to)	1-6
Number of pages	6
Journal	Applied Physics Letters
Volume	122
Issue number	20
DOIs	https://doi.org/10.1063/5.0149583
Publication status	Published - 15 May 2023
MoE publication type	A1 Journal article-refereed

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10.1063/5.0149583

Imaging of short-wavelength spin waves in a nanometer-thick YIG_Co bilayer Final published version, 2.14 MB

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@article{c19cef65efd54e23ab20a924ad93292a,

title = "Imaging of short-wavelength spin waves in a nanometer-thick YIG/Co bilayer",

abstract = "We report the imaging of short-wavelength spin waves in a continuous nanometer-thick YIG film with a Co stripe patterned on top. Dynamic dipolar coupling between the YIG film and the Co stripe lowers the spin-wave wavelength when spin waves enter the YIG/Co bilayer region from the bare YIG film, causing partial reflection at the YIG/Co edge. We use time-resolved scanning transmission x-ray microscopy to image the mode conversion process down to a wavelength of 280 nm and extract the spin-wave dispersion, decay length, and magnetic damping in the YIG/Co bilayer. We also analyze spin-wave reflection from the YIG/Co edge and its dependence on the wavelength of incoming and transmitted spin waves.",

author = "Abhishek Talapatra and Huajun Qin and Frank Schulz and Lide Yao and Luk{\'a}{\v s} Flaj{\v s}man and Markus Weigand and Sebastian Wintz and {van Dijken}, Sebastiaan",

note = "Funding Information: This work was supported by the Academy of Finland (Grant Nos. 317918, 325480, and 338748). Lithography and FIB milling were performed at the OtaNano-Micronova Nanofabrication Center and the OtaNano-NanoMicroscopy Center, respectively, supported by Aalto University. Computational resources were provided by the Aalto Science-IT project. We thank Helmholtz-Zentrum Berlin for the allocation of synchrotron radiation beamtime. ",

year = "2023",

month = may,

day = "15",

doi = "10.1063/5.0149583",

language = "English",

volume = "122",

pages = "1--6",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "20",

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TY - JOUR

T1 - Imaging of short-wavelength spin waves in a nanometer-thick YIG/Co bilayer

AU - Talapatra, Abhishek

AU - Qin, Huajun

AU - Schulz, Frank

AU - Yao, Lide

AU - Flajšman, Lukáš

AU - Weigand, Markus

AU - Wintz, Sebastian

AU - van Dijken, Sebastiaan

N1 - Funding Information: This work was supported by the Academy of Finland (Grant Nos. 317918, 325480, and 338748). Lithography and FIB milling were performed at the OtaNano-Micronova Nanofabrication Center and the OtaNano-NanoMicroscopy Center, respectively, supported by Aalto University. Computational resources were provided by the Aalto Science-IT project. We thank Helmholtz-Zentrum Berlin for the allocation of synchrotron radiation beamtime.

PY - 2023/5/15

Y1 - 2023/5/15

N2 - We report the imaging of short-wavelength spin waves in a continuous nanometer-thick YIG film with a Co stripe patterned on top. Dynamic dipolar coupling between the YIG film and the Co stripe lowers the spin-wave wavelength when spin waves enter the YIG/Co bilayer region from the bare YIG film, causing partial reflection at the YIG/Co edge. We use time-resolved scanning transmission x-ray microscopy to image the mode conversion process down to a wavelength of 280 nm and extract the spin-wave dispersion, decay length, and magnetic damping in the YIG/Co bilayer. We also analyze spin-wave reflection from the YIG/Co edge and its dependence on the wavelength of incoming and transmitted spin waves.

AB - We report the imaging of short-wavelength spin waves in a continuous nanometer-thick YIG film with a Co stripe patterned on top. Dynamic dipolar coupling between the YIG film and the Co stripe lowers the spin-wave wavelength when spin waves enter the YIG/Co bilayer region from the bare YIG film, causing partial reflection at the YIG/Co edge. We use time-resolved scanning transmission x-ray microscopy to image the mode conversion process down to a wavelength of 280 nm and extract the spin-wave dispersion, decay length, and magnetic damping in the YIG/Co bilayer. We also analyze spin-wave reflection from the YIG/Co edge and its dependence on the wavelength of incoming and transmitted spin waves.

UR - http://www.scopus.com/inward/record.url?scp=85159855142&partnerID=8YFLogxK

U2 - 10.1063/5.0149583

DO - 10.1063/5.0149583

M3 - Article

AN - SCOPUS:85159855142

SN - 0003-6951

VL - 122

SP - 1

EP - 6

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 20

M1 - 202404

ER -

Imaging of short-wavelength spin waves in a nanometer-thick YIG/Co bilayer

Abstract

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Bridging Magnons: Bridging Magnons

-: Electro- and Optomagnonics in Hybrid Metamaterials

Active Control of Spin Waves in YIG-based Magnonics

OtaNano

OtaNano - Nanofab

OtaNano - Nanomicroscopy Center

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Imaging of short-wavelength spin waves in a nanometer-thick YIG/Co bilayer

Abstract

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Projects

Bridging Magnons: Bridging Magnons

-: Electro- and Optomagnonics in Hybrid Metamaterials

Active Control of Spin Waves in YIG-based Magnonics

Equipment

OtaNano

OtaNano - Nanofab

OtaNano - Nanomicroscopy Center

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