Unidirectional propagation of zero-momentum magnons

Ondřej Wojewoda; Jakub Holobrádek; Dominik Pavelka; Ekaterina Pribytova; Jakub Krčma; Jan Klíma; Jaganandha Panda; Jan Michalička; Tomáš Lednický; Andrii V. Chumak; Michal Urbánek

doi:10.1063/5.0218478

Unidirectional propagation of zero-momentum magnons

Ondřej Wojewoda (Corresponding author)
, Jakub Holobrádek
, Dominik Pavelka
, Ekaterina Pribytova
, Jakub Krčma
, Jan Klíma
, Jaganandha Panda
, Jan Michalička
, Tomáš Lednický
, Andrii V. Chumak
, Michal Urbánek (Corresponding author)

Nanomagnetism and Magnonics

Publications: Contribution to journal › Article › Peer Reviewed

Abstract

We report on experimental observation of unidirectional propagation of zero-momentum magnons in synthetic antiferromagnet consisting of strained CoFeB/Ru/CoFeB trilayer. Inherent non-reciprocity of spin waves in synthetic antiferromagnets with uniaxial anisotropy results in smooth and monotonous dispersion relation around Gamma point, where the direction of the phase velocity is reversed, while the group velocity direction is conserved. The experimental observation of this phenomenon by intensity-, phase-, and time-resolved Brillouin light scattering microscopy is corroborated by analytical models and micromagnetic simulations.

Original language	English
Article number	132401
Number of pages	6
Journal	Applied Physics Letters
Volume	125
Issue number	13
DOIs	https://doi.org/10.1063/5.0218478
Publication status	Published - 23 Sept 2024

Austrian Fields of Science 2012

103015 Condensed matter
103017 Magnetism

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10.1063/5.0218478Licence: CC BY 4.0

Cite this

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title = "Unidirectional propagation of zero-momentum magnons",

abstract = "We report on experimental observation of unidirectional propagation of zero-momentum magnons in synthetic antiferromagnet consisting of strained CoFeB/Ru/CoFeB trilayer. Inherent non-reciprocity of spin waves in synthetic antiferromagnets with uniaxial anisotropy results in smooth and monotonous dispersion relation around Gamma point, where the direction of the phase velocity is reversed, while the group velocity direction is conserved. The experimental observation of this phenomenon by intensity-, phase-, and time-resolved Brillouin light scattering microscopy is corroborated by analytical models and micromagnetic simulations.",

author = "Ond{\v r}ej Wojewoda and Jakub Holobr{\'a}dek and Dominik Pavelka and Ekaterina Pribytova and Jakub Kr{\v c}ma and Jan Kl{\'i}ma and Jaganandha Panda and Jan Michali{\v c}ka and Tom{\'a}{\v s} Lednick{\'y} and Chumak, \{Andrii V.\} and Michal Urb{\'a}nek",

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doi = "10.1063/5.0218478",

language = "English",

volume = "125",

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TY - JOUR

T1 - Unidirectional propagation of zero-momentum magnons

AU - Wojewoda, Ondřej

AU - Holobrádek, Jakub

AU - Pavelka, Dominik

AU - Pribytova, Ekaterina

AU - Krčma, Jakub

AU - Klíma, Jan

AU - Panda, Jaganandha

AU - Michalička, Jan

AU - Lednický, Tomáš

AU - Chumak, Andrii V.

AU - Urbánek, Michal

PY - 2024/9/23

Y1 - 2024/9/23

N2 - We report on experimental observation of unidirectional propagation of zero-momentum magnons in synthetic antiferromagnet consisting of strained CoFeB/Ru/CoFeB trilayer. Inherent non-reciprocity of spin waves in synthetic antiferromagnets with uniaxial anisotropy results in smooth and monotonous dispersion relation around Gamma point, where the direction of the phase velocity is reversed, while the group velocity direction is conserved. The experimental observation of this phenomenon by intensity-, phase-, and time-resolved Brillouin light scattering microscopy is corroborated by analytical models and micromagnetic simulations.

AB - We report on experimental observation of unidirectional propagation of zero-momentum magnons in synthetic antiferromagnet consisting of strained CoFeB/Ru/CoFeB trilayer. Inherent non-reciprocity of spin waves in synthetic antiferromagnets with uniaxial anisotropy results in smooth and monotonous dispersion relation around Gamma point, where the direction of the phase velocity is reversed, while the group velocity direction is conserved. The experimental observation of this phenomenon by intensity-, phase-, and time-resolved Brillouin light scattering microscopy is corroborated by analytical models and micromagnetic simulations.

UR - https://doi.org/10.48550/arXiv.2311.10044

UR - https://www.scopus.com/pages/publications/85205696210

U2 - 10.1063/5.0218478

DO - 10.1063/5.0218478

M3 - Article

SN - 0003-6951

VL - 125

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 13

M1 - 132401

ER -

Unidirectional propagation of zero-momentum magnons

Abstract

Austrian Fields of Science 2012

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MagFunc: Non-Reciprocal 3D Architectures for Magnonic Functionalities

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Unidirectional propagation of zero-momentum magnons

Abstract

Austrian Fields of Science 2012

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MagFunc: Non-Reciprocal 3D Architectures for Magnonic Functionalities

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