摘要
Hydrogenation-induced effects on magnetism have been widely studied because of their several potential applications. In this study, magnesium (Mg) was added to palladium (Pd)/ferromagnetic multilayers to enhance and stabilize the effects of hydrogenation. Bulk Mg is known to require high temperature and high pressure to absorb hydrogen (H). With the catalytic Pd-capping layer, Mg is confirmed to absorb H at room temperature under 1 bar H2 pressure. The magneto-optic Kerr effect of Pd/Cobalt (Co)/Mg multilayer was measured under vacuum and under 1 bar H2 pressure for comparison. The hydrogenation effect enhanced the magnetic coercivity from 25 to approximately 200 Oe irreversibly. Correspondingly, the surface roughness increased from 0.1 to 6 nm. The crystalline structure, as confirmed using X-ray diffraction, transformed from pure Mg to magnesium hydride (MgH2) after hydrogenation. These observations reveal the correlation between MgH2 formation and the magnetic properties of the Pd/Co/Mg multilayer and are valuable for the control of H-migration in spintronic devices.
原文 | 英語 |
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文章編號 | 102503 |
期刊 | Surfaces and Interfaces |
卷 | 36 |
DOIs | |
出版狀態 | 已發佈 - 2023 2月 |
ASJC Scopus subject areas
- 表面、塗料和薄膜