Spin-orbit torque effects in all-electrical spin-wave spectroscopy experiments
Abstract
Electrical excitation and detection of propagating spin waves are key elements of magnonic devices. While conventional antennas consisting of non-magnetic metals such as Au or Cu excite spin waves predominantly through radio-frequency (RF) Oersted fields, antennas comprising Pt can additionally generate spin-orbit torques (SOTs) via the spin Hall effect. Recent theoretical work has proposed RF-SOT as an alternative mechanism for coherent spin-wave excitation, predicting distinct characteristics compared with conventional inductive excitation. Here, we investigate Pt antennas for the excitation of coherent spin waves in 105-nm-thick epitaxial Y3Fe5O12 (YIG) films through two potential mechanisms: an oscillating Oersted field and an oscillating spin current. The raw experimental transmission spectra are strongly affected by fabrication-induced modifications to the YIG film associated with the etching process together with spatially inhomogeneous interface conditions induced by Pt. After removing these contributions, we find the remaining two wave propagation consistent with a combined excitation from Oersted fields and SOTs.
Related
- Field-free and Sub-ns Magnetization Reversal in Synthetic Anti-ferromagnets using Sequential Spin-Orbit Torque and Spin-Transfer Torque Pulses
- Programmable Asymmetric Spin-Orbit Torque Switching for Spin Logic
- Self-induced spin-orbit torque switching in a synthetic antiferromagnetic Co 2 MnGa /MnGa bilayer
- Polarity-selective domain wall propagation driven by spin-orbit torque
- Néel vector switching by magnetization-dependent layer-resolved spin-orbit torque
BibTeX
@misc{cordova2026spinorbit,
title = {{Spin-orbit torque effects in all-electrical spin-wave spectroscopy experiments}},
author = {José Solano Córdova and Jone Mencos and Richard Schlitz and Quentin Rossi and Denise Reustlen and Javed Ali and Sebastian Sailler and Michaela Lammel and Matthieu Bailleul and Daniel Stoeffler and Felix Casanova and Sebastian T. B. Goennenwein and Helena Reichlova},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.17095},
eprint = {2610.17095},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.17095},
note = {CC BY-NC-SA 4.0},
}
RIS
TY - UNPB
TI - Spin-orbit torque effects in all-electrical spin-wave spectroscopy experiments
AU - José Solano Córdova
AU - Jone Mencos
AU - Richard Schlitz
AU - Quentin Rossi
AU - Denise Reustlen
AU - Javed Ali
AU - Sebastian Sailler
AU - Michaela Lammel
AU - Matthieu Bailleul
AU - Daniel Stoeffler
AU - Felix Casanova
AU - Sebastian T. B. Goennenwein
AU - Helena Reichlova
PY - 2026
DA - 2026/10/12
PB - arXiv
DO - 10.48550/arxiv.2610.17095
UR - https://arxiv.org/abs/2610.17095
AB - Electrical excitation and detection of propagating spin waves are key elements of magnonic devices. While conventional antennas consisting of non-magnetic metals such as Au or Cu excite spin waves predominantly through radio-frequency (RF) Oersted fields, antennas comprising Pt can additionally generate spin-orbit torques (SOTs) via the spin Hall effect. Recent theoretical work has proposed RF-SOT as an alternative mechanism for coherent spin-wave excitation, predicting distinct characteristics compared with conventional inductive excitation. Here, we investigate Pt antennas for the excitation of coherent spin waves in 105-nm-thick epitaxial Y_3Fe_5O_12 (YIG) films through two potential mechanisms: an oscillating Oersted field and an oscillating spin current. The raw experimental transmission spectra are strongly affected by fabrication-induced modifications to the YIG film associated with the etching process together with spatially inhomogeneous interface conditions induced by Pt. After removing these contributions, we find the remaining two wave propagation consistent with a combined excitation from Oersted fields and SOTs.
ER -