Emission and propagation of 1D and 2D spin waves with nanoscale wavelengths in anisotropic spin textures

Nature Nanotechnology
Volker SlukaSebastian Wintz

Abstract

Spin waves offer intriguing perspectives for computing and signal processing, because their damping can be lower than the ohmic losses in conventional complementary metal-oxide-semiconductor (CMOS) circuits. Magnetic domain walls show considerable potential as magnonic waveguides for on-chip control of the spatial extent and propagation of spin waves. However, low-loss guidance of spin waves with nanoscale wavelengths and around angled tracks remains to be shown. Here, we demonstrate spin wave control using natural anisotropic features of magnetic order in an interlayer exchange-coupled ferromagnetic bilayer. We employ scanning transmission X-ray microscopy to image the generation of spin waves and their propagation across distances exceeding multiples of the wavelength. Spin waves propagate in extended planar geometries as well as along straight or curved one-dimensional domain walls. We observe wavelengths between 1 μm and 150 nm, with excitation frequencies ranging from 250 MHz to 3 GHz. Our results show routes towards the practical implementation of magnonic waveguides in the form of domain walls in future spin wave logic and computational circuits.

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Citations

Jan 17, 2020·Advanced Materials·Edoardo AlbisettiDaniela Petti
Oct 11, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·S Lendinez, M B Jungfleisch
Nov 13, 2020·Science Advances·Iacopo BertelliToeno van der Sar
Feb 5, 2021·Nature Communications·Aurore FincoVincent Jacques
Mar 2, 2021·ACS Nano·Jilei ChenHaiming Yu
May 21, 2021·Nano Letters·Zhenghua LiChenglin Yan
Mar 5, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Anjan BarmanM Winklhofer
Sep 16, 2020·Nano Letters·Peter DunneBernard Doudin
Oct 28, 2021·Advanced Materials·Denys MakarovOleksandr V Dobrovolskiy
Nov 23, 2021·Nano Letters·Volker NeuOliver G Schmidt
Oct 14, 2021·Nanotechnology·Bivas RanaAnjan Barman

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Methods Mentioned

BETA
chip
X-ray
circular dichroism
chips
transmission electron microscopy
electron beam lithography

Software Mentioned

MuMax

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