Detection of hydrogen by the extraordinary Hall effect in CoPd alloys

S. S. Das; G. Kopnov; A. Gerber

doi:10.1063/1.5049647

Detection of hydrogen by the extraordinary Hall effect in CoPd alloys

S. S. Das, G. Kopnov, A. Gerber

School of Physics and Astronomy

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

The effect of hydrogen adsorption on the extraordinary Hall phenomenon (EHE) in ferromagnetic CoPd films is studied as a function of composition, thickness, substrate, and hydrogen concentration in the atmosphere. Adsorption of hydrogen adds a positive term in the extraordinary Hall effect coefficient and modifies the perpendicular magnetic anisotropy with the respective changes in coercivity and remanence of hysteresis loops. Hydrogen sensitive compositions are within the Co concentration range of 20% ≤ x ≤ 50% with the strongest response near the EHE polarity reversal point x 0 ∼ 38%. Depending on the film composition and field of operation, the EHE response of CoPd to low concentration hydrogen can reach hundreds of percent, which makes the method and the material attractive for hydrogen sensing.

Original language	English
Article number	104502
Journal	Journal of Applied Physics
Volume	124
Issue number	10
DOIs	https://doi.org/10.1063/1.5049647
State	Published - 14 Sep 2018

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1063/1.5049647

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title = "Detection of hydrogen by the extraordinary Hall effect in CoPd alloys",

abstract = "The effect of hydrogen adsorption on the extraordinary Hall phenomenon (EHE) in ferromagnetic CoPd films is studied as a function of composition, thickness, substrate, and hydrogen concentration in the atmosphere. Adsorption of hydrogen adds a positive term in the extraordinary Hall effect coefficient and modifies the perpendicular magnetic anisotropy with the respective changes in coercivity and remanence of hysteresis loops. Hydrogen sensitive compositions are within the Co concentration range of 20% ≤ x ≤ 50% with the strongest response near the EHE polarity reversal point x 0 ∼ 38%. Depending on the film composition and field of operation, the EHE response of CoPd to low concentration hydrogen can reach hundreds of percent, which makes the method and the material attractive for hydrogen sensing.",

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AU - Kopnov, G.

AU - Gerber, A.

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N2 - The effect of hydrogen adsorption on the extraordinary Hall phenomenon (EHE) in ferromagnetic CoPd films is studied as a function of composition, thickness, substrate, and hydrogen concentration in the atmosphere. Adsorption of hydrogen adds a positive term in the extraordinary Hall effect coefficient and modifies the perpendicular magnetic anisotropy with the respective changes in coercivity and remanence of hysteresis loops. Hydrogen sensitive compositions are within the Co concentration range of 20% ≤ x ≤ 50% with the strongest response near the EHE polarity reversal point x 0 ∼ 38%. Depending on the film composition and field of operation, the EHE response of CoPd to low concentration hydrogen can reach hundreds of percent, which makes the method and the material attractive for hydrogen sensing.

AB - The effect of hydrogen adsorption on the extraordinary Hall phenomenon (EHE) in ferromagnetic CoPd films is studied as a function of composition, thickness, substrate, and hydrogen concentration in the atmosphere. Adsorption of hydrogen adds a positive term in the extraordinary Hall effect coefficient and modifies the perpendicular magnetic anisotropy with the respective changes in coercivity and remanence of hysteresis loops. Hydrogen sensitive compositions are within the Co concentration range of 20% ≤ x ≤ 50% with the strongest response near the EHE polarity reversal point x 0 ∼ 38%. Depending on the film composition and field of operation, the EHE response of CoPd to low concentration hydrogen can reach hundreds of percent, which makes the method and the material attractive for hydrogen sensing.

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M3 - مقالة

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 10

M1 - 104502

ER -

Detection of hydrogen by the extraordinary Hall effect in CoPd alloys

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