Hydrogen-mediated long-range magnetic ordering in Pd-rich alloy film

Wen Chin Lin, Cheng Jui Tsai, Han Yuan Huang, Bo Yao Wang, Venkata Ramana Mudinepalli, Hsiang Chih Chiu

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Abstract

The effect of hydrogenation on a 14 nm Co14Pd86/Al2O3(0001) thin film was investigated on the basis of the magnetooptical Kerr effect. After exposure to H2 gas, the squareness of the hysteresis loop showed a large transition from approximately 10% to 100% and the saturation Kerr signal was reduced to nearly 30% of the pristine value. The reversibility of the transition was verified and the response time was within 2-3 s. These observations indicate that the hydride formation transformed the short-range coupled and disordered magnetic state of the Co14Pd86 film to a long-range-ordered ferromagnetic state and induced appreciable decrease in the magnetic moment. The enhanced long-range-ordering and the reduction of the magnetic moment were attributed to the change of electronic structure in Co14Pd86 with hydrogen uptake.

Original languageEnglish
Article number012404
JournalApplied Physics Letters
Volume106
Issue number1
DOIs
Publication statusPublished - 2015 Jan 5

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Lin, W. C., Tsai, C. J., Huang, H. Y., Wang, B. Y., Mudinepalli, V. R., & Chiu, H. C. (2015). Hydrogen-mediated long-range magnetic ordering in Pd-rich alloy film. Applied Physics Letters, 106(1), [012404]. https://doi.org/10.1063/1.4905463