宽度和厚度对 permalloy 微条纹波导中传播的自旋波的影响

IF 2.7 3区 物理与天体物理 Q2 PHYSICS, APPLIED Journal of Applied Physics Pub Date : 2024-09-05 DOI:10.1063/5.0223672
M. S. Devapriya, Nair S. Aditya, Mahathi Kuchibhotla, Adekunle Olusola Adeyeye, Arabinda Haldar
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引用次数: 0

摘要

我们利用分析计算和实验报告了厚度和宽度对坡莫合金(Py)微带的自旋波传输和色散特性的影响。我们制作了宽度为 2 至 4 μm 的 Py 波导,厚度分别为 5 和 20 nm:5 纳米和 20 纳米。我们的研究结果表明,自旋波的群速度随着厚度的增加而显著提高,厚度增加时群速度提高了四倍。此外,随着厚度的增加,可访问的频率范围也从 0.6 GHz 扩大到 2.5 GHz。我们发现,自旋波模式频率同时受到厚度和宽度的影响,当宽度从 2 微米增加到 4 微米时,观察到大约 0.2 千兆赫的频率偏移。此外,自旋波在较薄的薄膜中衰减得更快,20 纳米厚波导的衰减长度是 5 纳米厚波导的四倍。更厚更宽的波导提供了更长的衰减长度,有利于在没有明显能量损失的情况下实现更长距离的信息传输。我们的研究有助于了解自旋波在微带波导中的传播及其在未来磁性器件开发中的潜力。
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Effect of width and thickness on propagating spin waves in permalloy microstripe waveguides
We report the effect of thickness and width on the spin wave transport and dispersion characteristics of permalloy (Py) microstripes using analytical calculations and experiments. Py waveguides with widths ranging from 2 to 4 μm were fabricated for two different thicknesses: 5 and 20 nm. Our results show a notable increase in the group velocity of spin waves with greater thickness, showing a fourfold rise as the thickness increases. Additionally, the accessible frequency range expands from 0.6 to 2.5 GHz as the thickness increases. We find that the spin wave mode frequency is affected by both thickness and width, with a frequency shift of approximately 0.2 GHz observed when the width increases from 2 to 4 μm. Moreover, spin waves decay more rapidly in thinner films, with the decay length of 20 nm-thick waveguides being four times longer than that of 5 nm-thick waveguides. Thicker and wider waveguides provide a longer decay length, facilitating the transmission of information over longer distances without significant energy loss. Our study offers an understanding of the spin wave propagation in microstrip waveguides and its potential in the development of future magnonic devices.
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来源期刊
Journal of Applied Physics
Journal of Applied Physics 物理-物理:应用
CiteScore
5.40
自引率
9.40%
发文量
1534
审稿时长
2.3 months
期刊介绍: The Journal of Applied Physics (JAP) is an influential international journal publishing significant new experimental and theoretical results of applied physics research. Topics covered in JAP are diverse and reflect the most current applied physics research, including: Dielectrics, ferroelectrics, and multiferroics- Electrical discharges, plasmas, and plasma-surface interactions- Emerging, interdisciplinary, and other fields of applied physics- Magnetism, spintronics, and superconductivity- Organic-Inorganic systems, including organic electronics- Photonics, plasmonics, photovoltaics, lasers, optical materials, and phenomena- Physics of devices and sensors- Physics of materials, including electrical, thermal, mechanical and other properties- Physics of matter under extreme conditions- Physics of nanoscale and low-dimensional systems, including atomic and quantum phenomena- Physics of semiconductors- Soft matter, fluids, and biophysics- Thin films, interfaces, and surfaces
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