Thermally modulated hydrogenation in FexPd1-x alloy films: Temperature-driven peculiar variation of magnetism

Po Chun Chang*, Tzu Hung Chuang, Der Hsin Wei, Wen Chin Lin

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

3 引文 斯高帕斯(Scopus)

摘要

The sensitive hydrogen effect on spintronic materials has been recently demonstrated to have high application potential. However, the correlation between hydrogen pressure (P H 2), temperature, and magnetic properties still remains unclear. In this study, the magnetic moment of Fe in an Fe-Pd alloy thin film was increased through hydrogen absorption, as evidenced by the enhanced X-ray magnetic circular dichroism signal of Fe. Hydrogen absorption and desorption hysteresis loops in the magnetic coercivity Hc-P H 2 diagram revealed that most hydrogen was absorbed when P H 2 was above 10 mbar and desorbed when P H 2 was approximately 10-6 mbar. The hydrogenation effect on the magnetism of an Fe-Pd alloy film was eliminated at an annealing temperature of 360 K without considerable hydrogen desorption. The annealing-driven cyclic enhancement of Hc was demonstrated because of the competition between thermal activation and H bonding. These results clearly reveal the critical temperature dependence and provide applicable knowledge of the hydrogenation effect on magnetic Pd-alloys.

原文英語
期刊Applied Physics Letters
116
發行號10
DOIs
出版狀態已發佈 - 2020 三月 9

ASJC Scopus subject areas

  • 物理與天文學(雜項)

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