Hydrogenation-induced strengthening of exchange bias coupling in antiferromagnetic Pd-rich alloy films

Bo Yao Wang; Chun Wei Shih; Ming Shian Tsai; Chia Ju Chen; Kai Lin; Jin Jhuan Li; Chun Wei Huang; Wen Chin Lin; Shih Chang Weng

doi:10.1016/j.jallcom.2018.03.121

Hydrogenation-induced strengthening of exchange bias coupling in antiferromagnetic Pd-rich alloy films

Bo Yao Wang, Chun Wei Shih, Ming Shian Tsai, Chia Ju Chen, Kai Lin, Jin Jhuan Li, Chun Wei Huang, Wen Chin Lin, Shih Chang Weng

Department of Physics

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

Hydrogenation has recently been proposed for use in modulating the magnetic properties of Pd-rich ferromagnetic (FM) alloy films. This study successfully fabricated Pd-rich Mn/MnPd/Fe antiferromagnetic/FM films with an established exchange bias field at RT, and determined that hydrogenation can enhance the exchange bias coupling in such films. Specifically, magnetic hysteresis loops revealed that the magnetic state of the Pd-rich Mn/MnPd/Fe films was gradually changed from an unbiased state to an exchange-biased state upon exposure to a hydrogen environment; moreover, hydrogenation engendered a larger magnitude of the exchange bias field than conventional field cooling. This phenomenon can be attributed to the enhanced long-range antiferromagnetic ordering of the Pd-rich MnPd film upon uptake of hydrogen atoms.

Original language	English
Pages (from-to)	223-229
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	748
DOIs	https://doi.org/10.1016/j.jallcom.2018.03.121
Publication status	Published - 2018 Jun 5

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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Wang, B. Y., Shih, C. W., Tsai, M. S., Chen, C. J., Lin, K., Li, J. J., Huang, C. W., Lin, W. C., & Weng, S. C. (2018). Hydrogenation-induced strengthening of exchange bias coupling in antiferromagnetic Pd-rich alloy films. Journal of Alloys and Compounds, 748, 223-229. https://doi.org/10.1016/j.jallcom.2018.03.121

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title = "Hydrogenation-induced strengthening of exchange bias coupling in antiferromagnetic Pd-rich alloy films",

abstract = "Hydrogenation has recently been proposed for use in modulating the magnetic properties of Pd-rich ferromagnetic (FM) alloy films. This study successfully fabricated Pd-rich Mn/MnPd/Fe antiferromagnetic/FM films with an established exchange bias field at RT, and determined that hydrogenation can enhance the exchange bias coupling in such films. Specifically, magnetic hysteresis loops revealed that the magnetic state of the Pd-rich Mn/MnPd/Fe films was gradually changed from an unbiased state to an exchange-biased state upon exposure to a hydrogen environment; moreover, hydrogenation engendered a larger magnitude of the exchange bias field than conventional field cooling. This phenomenon can be attributed to the enhanced long-range antiferromagnetic ordering of the Pd-rich MnPd film upon uptake of hydrogen atoms.",

author = "Wang, {Bo Yao} and Shih, {Chun Wei} and Tsai, {Ming Shian} and Chen, {Chia Ju} and Kai Lin and Li, {Jin Jhuan} and Huang, {Chun Wei} and Lin, {Wen Chin} and Weng, {Shih Chang}",

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doi = "10.1016/j.jallcom.2018.03.121",

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T1 - Hydrogenation-induced strengthening of exchange bias coupling in antiferromagnetic Pd-rich alloy films

AU - Wang, Bo Yao

AU - Shih, Chun Wei

AU - Tsai, Ming Shian

AU - Chen, Chia Ju

AU - Lin, Kai

AU - Li, Jin Jhuan

AU - Huang, Chun Wei

AU - Lin, Wen Chin

AU - Weng, Shih Chang

PY - 2018/6/5

Y1 - 2018/6/5

N2 - Hydrogenation has recently been proposed for use in modulating the magnetic properties of Pd-rich ferromagnetic (FM) alloy films. This study successfully fabricated Pd-rich Mn/MnPd/Fe antiferromagnetic/FM films with an established exchange bias field at RT, and determined that hydrogenation can enhance the exchange bias coupling in such films. Specifically, magnetic hysteresis loops revealed that the magnetic state of the Pd-rich Mn/MnPd/Fe films was gradually changed from an unbiased state to an exchange-biased state upon exposure to a hydrogen environment; moreover, hydrogenation engendered a larger magnitude of the exchange bias field than conventional field cooling. This phenomenon can be attributed to the enhanced long-range antiferromagnetic ordering of the Pd-rich MnPd film upon uptake of hydrogen atoms.

AB - Hydrogenation has recently been proposed for use in modulating the magnetic properties of Pd-rich ferromagnetic (FM) alloy films. This study successfully fabricated Pd-rich Mn/MnPd/Fe antiferromagnetic/FM films with an established exchange bias field at RT, and determined that hydrogenation can enhance the exchange bias coupling in such films. Specifically, magnetic hysteresis loops revealed that the magnetic state of the Pd-rich Mn/MnPd/Fe films was gradually changed from an unbiased state to an exchange-biased state upon exposure to a hydrogen environment; moreover, hydrogenation engendered a larger magnitude of the exchange bias field than conventional field cooling. This phenomenon can be attributed to the enhanced long-range antiferromagnetic ordering of the Pd-rich MnPd film upon uptake of hydrogen atoms.

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