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Low-Loss Nanoscopic Spin-Wave Guiding in Continuous Yttrium Iron Garnet Films
Nano Letters ( IF 10.8 ) Pub Date : 2022-06-21 , DOI: 10.1021/acs.nanolett.2c01238
Huajun Qin 1, 2, 3 , Rasmus B Holländer 1 , Lukáš Flajšman 1 , Sebastiaan van Dijken 1
Affiliation  

Long-distance transport and control of spin waves through nanochannels is essential for integrated magnonic technology. Current strategies relying on the patterning of single-layer nano-waveguides suffer from a decline of the spin-wave decay length upon downscaling or require large magnetic bias field. Here, we introduce a new waveguiding structure based on low-damping continuous yttrium iron garnet (YIG) films. Rather than patterning the YIG film, we define nanoscopic spin-wave transporting channels within YIG by dipolar coupling to ferromagnetic metal nanostripes. The hybrid material structure offers long-distance transport of spin waves with a decay length of ∼20 μm in 160 nm wide waveguides over a broad frequency range at small bias field. We further evidence that spin waves can be redirected easily by stray-field-induced bends in continuous YIG films. The combination of low-loss spin-wave guiding and straightforward nanofabrication highlights a new approach toward the implementation of magnonic integrated circuits for spin-wave computing.

中文翻译:

连续钇铁石榴石薄膜中的低损耗纳米级自旋波引导

通过纳米通道长距离传输和控制自旋波对于集成磁振子技术至关重要。当前依赖于单层纳米波导图案化的策略在缩小尺寸或需要大的偏磁场时会遭受自旋波衰减长度的下降。在这里,我们介绍了一种基于低阻尼连续钇铁石榴石(YIG)薄膜的新波导结构。我们不是对 YIG 薄膜进行图案化,而是通过与铁磁金属纳米条的偶极耦合来定义 YIG 内的纳米级自旋波传输通道。混合材料结构在小偏置场的宽频率范围内,在 160 nm 宽的波导中提供衰减长度约为 20 μm 的自旋波的长距离传输。我们进一步证明,连续 YIG 薄膜中的杂散场引起的弯曲可以很容易地重定向自旋波。低损耗自旋波引导和简单的纳米加工相结合,突出了一种实现自旋波计算的磁力集成电路的新方法。
更新日期:2022-06-21
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