Spin-torque skyrmion resonance in a frustrated magnet induced by spin-polarized currents

Nirel Bernstein; Hang Li; Benjamin Assouline; Yong Chang Lau; Igor Rozhansky; Wenhong Wang; Amir Capua

doi:10.1117/12.3066144

Spin-torque skyrmion resonance in a frustrated magnet induced by spin-polarized currents

Nirel Bernstein
, Hang Li
, Benjamin Assouline
, Yong Chang Lau
, Igor Rozhansky
, Wenhong Wang
, Amir Capua^*

^*Corresponding author for this work

The Institute of Applied Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Skyrmions offer potential for ultra-dense magnetic data storage, typically stabilized by Dzyaloshinskii-Moriya interaction (DMI). Recently, magnetic frustration was shown to stabilize Skyrmions without DMI, as observed in Fe_3Sn2 crystals, where they persist above room temperature and respond to electrical currents. We introduce a technique to study Skyrmion ferromagnetic resonance (FMR) in bulk Fe_3Sn2 using AC spin torque and time-resolved optical probing. We resolve counter-clockwise and breathing modes and track magnetic phase transitions. Simulations via OOMMF confirm a transition from a disordered state to a stripe phase, and ultimately to a uniform Skyrmion crystal lattice. Applying a DC current modulates the Skyrmion resonance linewidth, attributed to damping-like spin-orbit torque as supported by micromagnetic simulations. We extract an effective spin Hall conductivity of ~793 ± 176 (ℏ/e)(Ω cm)^-1. Planar Hall measurements reveal real-space spin texture contributions, highlighting prospects for Skyrmion-based spin current sensing.

Original language	English
Title of host publication	Spintronics XVIII
Editors	Jean-Eric Wegrowe, Joseph S. Friedman, Manijeh Razeghi, Henri Jaffres
Publisher	SPIE
ISBN (Electronic)	9781510690806
DOIs	https://doi.org/10.1117/12.3066144
State	Published - 18 Sep 2025
Event	18th Spintronics - San Diego, United States Duration: 3 Aug 2025 → 7 Aug 2025

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	13586
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	18th Spintronics
Country/Territory	United States
City	San Diego
Period	3/08/25 → 7/08/25

Bibliographical note

Publisher Copyright:
© 2025 Published by SPIE.

Keywords

Skyrmion
Skyrmion resonance
ferromagnetic resonance
spin orbit torque
spin transfer torque

Access to Document

10.1117/12.3066144

Cite this

Bernstein, N., Li, H., Assouline, B., Lau, Y. C., Rozhansky, I., Wang, W., & Capua, A. (2025). Spin-torque skyrmion resonance in a frustrated magnet induced by spin-polarized currents. In J.-E. Wegrowe, J. S. Friedman, M. Razeghi, & H. Jaffres (Eds.), Spintronics XVIII Article 1358609 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 13586). SPIE. https://doi.org/10.1117/12.3066144

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title = "Spin-torque skyrmion resonance in a frustrated magnet induced by spin-polarized currents",

abstract = "Skyrmions offer potential for ultra-dense magnetic data storage, typically stabilized by Dzyaloshinskii-Moriya interaction (DMI). Recently, magnetic frustration was shown to stabilize Skyrmions without DMI, as observed in Fe3Sn2 crystals, where they persist above room temperature and respond to electrical currents. We introduce a technique to study Skyrmion ferromagnetic resonance (FMR) in bulk Fe3Sn2 using AC spin torque and time-resolved optical probing. We resolve counter-clockwise and breathing modes and track magnetic phase transitions. Simulations via OOMMF confirm a transition from a disordered state to a stripe phase, and ultimately to a uniform Skyrmion crystal lattice. Applying a DC current modulates the Skyrmion resonance linewidth, attributed to damping-like spin-orbit torque as supported by micromagnetic simulations. We extract an effective spin Hall conductivity of \textasciitilde{}793 ± 176 (ℏ/e)(Ω cm)-1. Planar Hall measurements reveal real-space spin texture contributions, highlighting prospects for Skyrmion-based spin current sensing.",

keywords = "Skyrmion, Skyrmion resonance, ferromagnetic resonance, spin orbit torque, spin transfer torque",

author = "Nirel Bernstein and Hang Li and Benjamin Assouline and Lau, \{Yong Chang\} and Igor Rozhansky and Wenhong Wang and Amir Capua",

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doi = "10.1117/12.3066144",

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Bernstein, N, Li, H, Assouline, B, Lau, YC, Rozhansky, I, Wang, W & Capua, A 2025, Spin-torque skyrmion resonance in a frustrated magnet induced by spin-polarized currents. in J-E Wegrowe, JS Friedman, M Razeghi & H Jaffres (eds), Spintronics XVIII., 1358609, Proceedings of SPIE - The International Society for Optical Engineering, vol. 13586, SPIE, 18th Spintronics, San Diego, United States, 3/08/25. https://doi.org/10.1117/12.3066144

Spin-torque skyrmion resonance in a frustrated magnet induced by spin-polarized currents. / Bernstein, Nirel; Li, Hang; Assouline, Benjamin et al.
Spintronics XVIII. ed. / Jean-Eric Wegrowe; Joseph S. Friedman; Manijeh Razeghi; Henri Jaffres. SPIE, 2025. 1358609 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 13586).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Spin-torque skyrmion resonance in a frustrated magnet induced by spin-polarized currents

AU - Bernstein, Nirel

AU - Li, Hang

AU - Assouline, Benjamin

AU - Lau, Yong Chang

AU - Rozhansky, Igor

AU - Wang, Wenhong

AU - Capua, Amir

PY - 2025/9/18

Y1 - 2025/9/18

N2 - Skyrmions offer potential for ultra-dense magnetic data storage, typically stabilized by Dzyaloshinskii-Moriya interaction (DMI). Recently, magnetic frustration was shown to stabilize Skyrmions without DMI, as observed in Fe3Sn2 crystals, where they persist above room temperature and respond to electrical currents. We introduce a technique to study Skyrmion ferromagnetic resonance (FMR) in bulk Fe3Sn2 using AC spin torque and time-resolved optical probing. We resolve counter-clockwise and breathing modes and track magnetic phase transitions. Simulations via OOMMF confirm a transition from a disordered state to a stripe phase, and ultimately to a uniform Skyrmion crystal lattice. Applying a DC current modulates the Skyrmion resonance linewidth, attributed to damping-like spin-orbit torque as supported by micromagnetic simulations. We extract an effective spin Hall conductivity of ~793 ± 176 (ℏ/e)(Ω cm)-1. Planar Hall measurements reveal real-space spin texture contributions, highlighting prospects for Skyrmion-based spin current sensing.

AB - Skyrmions offer potential for ultra-dense magnetic data storage, typically stabilized by Dzyaloshinskii-Moriya interaction (DMI). Recently, magnetic frustration was shown to stabilize Skyrmions without DMI, as observed in Fe3Sn2 crystals, where they persist above room temperature and respond to electrical currents. We introduce a technique to study Skyrmion ferromagnetic resonance (FMR) in bulk Fe3Sn2 using AC spin torque and time-resolved optical probing. We resolve counter-clockwise and breathing modes and track magnetic phase transitions. Simulations via OOMMF confirm a transition from a disordered state to a stripe phase, and ultimately to a uniform Skyrmion crystal lattice. Applying a DC current modulates the Skyrmion resonance linewidth, attributed to damping-like spin-orbit torque as supported by micromagnetic simulations. We extract an effective spin Hall conductivity of ~793 ± 176 (ℏ/e)(Ω cm)-1. Planar Hall measurements reveal real-space spin texture contributions, highlighting prospects for Skyrmion-based spin current sensing.

KW - Skyrmion

KW - Skyrmion resonance

KW - ferromagnetic resonance

KW - spin orbit torque

KW - spin transfer torque

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A2 - Friedman, Joseph S.

A2 - Razeghi, Manijeh

A2 - Jaffres, Henri

PB - SPIE

T2 - 18th Spintronics

Y2 - 3 August 2025 through 7 August 2025

ER -

Spin-torque skyrmion resonance in a frustrated magnet induced by spin-polarized currents

Abstract

Publication series

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Bibliographical note

Keywords

Access to Document

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