https://scholars.lib.ntu.edu.tw/handle/123456789/633971
標題: | Hydrogen-induced magnetic and structural changes in Pd/Co/Mg multilayer | 作者: | Liaw, Li Jie Chang, Po Chun Chen, Po Wei Liu, Zi Qi Liu, Shi Yu Hsieh, Chun Tse Dhanarajgopal, Alltrin MING-YAU CHERN Lo, Fang Yuh Lin, Wen Chin |
公開日期: | 1-二月-2023 | 卷: | 36 | 來源出版物: | Surfaces and Interfaces | 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. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/633971 | ISSN: | 24680230 | DOI: | 10.1016/j.surfin.2022.102503 |
顯示於: | 物理學系 |
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