Nanometer-Thick Palladium–Cobalt Alloy Films for Hydrogen Sensors and Hydrogen-Mediated Devices

IF 5.5 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Applied Nano Materials Pub Date : 2025-04-01 DOI:10.1021/acsanm.5c0039210.1021/acsanm.5c00392

Takashi Harumoto*, Jundong Song, Yuan-Hua Lin and Ji Shi,

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引用次数: 0

Abstract

Palladium–cobalt (PdCo) alloy nanofilms are expected to play important roles in future hydrogen (H) energy-based society and H-mediated spintronic devices due to their H absorption and large spin–orbit interaction (SOI). Large SOI causes magnetic anisotropy in PdCo films to be sensitive to film stress via the magnetoelastic coupling or inverse magnetostriction effect. Considering this situation, by employing several PdCo alloy nanofilms, we investigated the impact of initial magnetic anisotropy on H₂ sensitivity. Our systematic investigation revealed that instability in magnetic anisotropy is important, as it enables absorbed H atoms to induce a large change in magnetic properties, resulting in higher H₂ sensitivity. In addition to magnetic anisotropy, nanosized effects have also been revealed to be important for enhancing H₂ sensitivity. Based on the measured results and discussion, design guidelines for H₂ sensors and H-mediated devices are summarized. The results from this study facilitate the use of both present PdCo and other related alloy films and will help accelerate research and development on H₂ sensors and H-mediated devices.

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用于氢传感器和氢介导器件的纳米厚钯钴合金薄膜

钯钴（PdCo）合金纳米膜由于其吸氢特性和较大的自旋轨道相互作用（SOI），有望在未来氢(H)能社会和氢介导的自旋电子器件中发挥重要作用。大SOI使PdCo薄膜中的磁各向异性通过磁弹性耦合或逆磁致伸缩效应对薄膜应力敏感。考虑到这种情况，我们采用了几种PdCo合金纳米膜，研究了初始磁各向异性对H2敏感性的影响。我们的系统研究表明，磁各向异性的不稳定性是重要的，因为它使吸收的氢原子引起磁性质的大变化，从而导致更高的H2敏感性。除了磁各向异性外，纳米效应对增强H2敏感性也很重要。根据测量结果和讨论，总结了氢传感器和氢介导器件的设计准则。本研究的结果促进了现有PdCo和其他相关合金薄膜的使用，并将有助于加速H2传感器和h介导器件的研究和开发。

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

ACS Applied Nano Materials Multiple-

CiteScore

8.30

自引率

3.40%

发文量

1601

期刊介绍： ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.