YIG/CoFeB Bilayer Magnonic Isolator

IF 1.1 4区物理与天体物理 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Magnetics Letters Pub Date : 2025-03-17 DOI:10.1109/LMAG.2025.3551990

Noura Zenbaa;Khrystyna O. Levchenko;Jaganandha Panda;Kristýna Davídková;Moritz Ruhwedel;Sebastian Knauer;Morris Lindner;Carsten Dubs;Qi Wang;Michal Urbánek;Philipp Pirro;Andrii V. Chumak

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引用次数: 0

Abstract

We demonstrate a magnonic isolator based on a bilayer structure of yttrium iron garnet (YIG) and cobalt iron boron (CoFeB). The bilayer exhibits pronounced nonreciprocal spin-wave propagation, enabled by dipolar coupling and the magnetic properties of the two layers. The YIG layer provides low damping and efficient spin-wave propagation, whereas the CoFeB layer introduces strong magnetic anisotropy, critical for achieving the isolator functionality. Experimental results, supported by numerical simulations, show unidirectional propagation of magneto-static surface spin waves, significantly suppressing backscattered waves. This behavior was confirmed through wavevector-resolved and microfocused Brillouin light scattering measurements and is supported by numerical simulations. The developed YIG/SiO

$_{2}$

/CoFeB bilayer magnonic isolator demonstrates the feasibility of leveraging nonreciprocal spin-wave dynamics for functional magnonic devices, paving the way for energy-efficient, wave-based signal processing technologies.

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YIG/CoFeB双层磁振子

我们展示了一种基于钇铁石榴石（YIG）和钴铁硼（CoFeB）双层结构的磁振子隔离器。由于双极偶极耦合和两层的磁性，双极层表现出明显的非互易自旋波传播。YIG层提供了低阻尼和有效的自旋波传播，而CoFeB层引入了强磁各向异性，这对实现隔离器功能至关重要。实验结果与数值模拟结果一致，表明静磁表面自旋波的单向传播对后向散射波有明显的抑制作用。通过波矢量分辨和微聚焦布里渊光散射测量证实了这种行为，并得到了数值模拟的支持。开发的YIG/SiO$_{2}$/CoFeB双层磁振子隔离器证明了利用非互易自旋波动力学用于功能磁振器件的可行性，为节能的基于波的信号处理技术铺平了道路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Magnetics Letters PHYSICS, APPLIED-

CiteScore

2.40

自引率

0.00%

发文量

期刊介绍： IEEE Magnetics Letters is a peer-reviewed, archival journal covering the physics and engineering of magnetism, magnetic materials, applied magnetics, design and application of magnetic devices, bio-magnetics, magneto-electronics, and spin electronics. IEEE Magnetics Letters publishes short, scholarly articles of substantial current interest. IEEE Magnetics Letters is a hybrid Open Access (OA) journal. For a fee, authors have the option making their articles freely available to all, including non-subscribers. OA articles are identified as Open Access.