Using magnetic structure of Co40Pd60/Cu for the sensing of hydrogen

Jaw Yeu Liang; Yun Chieh Pai; Tu Ngoc Lam; Wen Chin Lin; Ting Shan Chan; Chih Huang Lai; Yuan Chieh Tseng

doi:10.1063/1.4993158

Using magnetic structure of Co₄₀Pd₆₀/Cu for the sensing of hydrogen

Jaw Yeu Liang^*, Yun Chieh Pai, Tu Ngoc Lam, Wen Chin Lin, Ting Shan Chan, Chih Huang Lai, Yuan Chieh Tseng

^*Corresponding author for this work

Department of Physics

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

15 Citations (Scopus)

Abstract

This paper reports on a magnetic device with a [Co₄₀Pd₆₀/Cu]₁₀/Fe structure for use in the detection of H₂. In a magneto-optical, transport, and gas-detection system, the proposed device presented sharp, reproducible H₂-dependent magnetic/electrical properties. The device's saturation magnetization (induced resistance change) dropped (increased) by a factor of ∼5 when a H₂ pressure of 75 kPa is given. Besides, the electrical signal-to-noise ratio of the device can be restored ∼50% by exposing it to a magnetic field of 1000 Oe, even when the sensitivity of the device dropped at a low H₂ pressure (0.7 KPa). This demonstrates the applicability of the device for use as a low-pressure H₂ detector. Operando x-ray spectroscopy revealed that changes in H₂-induced magnetism arose from a Co-Pd charge transfer effect coupled to changes in the local-structure symmetry.

Original language	English
Article number	023503
Journal	Applied Physics Letters
Volume	111
Issue number	2
DOIs	https://doi.org/10.1063/1.4993158
Publication status	Published - 2017 Jul 10

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4993158

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title = "Using magnetic structure of Co40Pd60/Cu for the sensing of hydrogen",

abstract = "This paper reports on a magnetic device with a [Co40Pd60/Cu]10/Fe structure for use in the detection of H2. In a magneto-optical, transport, and gas-detection system, the proposed device presented sharp, reproducible H2-dependent magnetic/electrical properties. The device's saturation magnetization (induced resistance change) dropped (increased) by a factor of ∼5 when a H2 pressure of 75 kPa is given. Besides, the electrical signal-to-noise ratio of the device can be restored ∼50% by exposing it to a magnetic field of 1000 Oe, even when the sensitivity of the device dropped at a low H2 pressure (0.7 KPa). This demonstrates the applicability of the device for use as a low-pressure H2 detector. Operando x-ray spectroscopy revealed that changes in H2-induced magnetism arose from a Co-Pd charge transfer effect coupled to changes in the local-structure symmetry.",

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AU - Liang, Jaw Yeu

AU - Pai, Yun Chieh

AU - Lam, Tu Ngoc

AU - Lin, Wen Chin

AU - Chan, Ting Shan

AU - Lai, Chih Huang

AU - Tseng, Yuan Chieh

PY - 2017/7/10

Y1 - 2017/7/10

N2 - This paper reports on a magnetic device with a [Co40Pd60/Cu]10/Fe structure for use in the detection of H2. In a magneto-optical, transport, and gas-detection system, the proposed device presented sharp, reproducible H2-dependent magnetic/electrical properties. The device's saturation magnetization (induced resistance change) dropped (increased) by a factor of ∼5 when a H2 pressure of 75 kPa is given. Besides, the electrical signal-to-noise ratio of the device can be restored ∼50% by exposing it to a magnetic field of 1000 Oe, even when the sensitivity of the device dropped at a low H2 pressure (0.7 KPa). This demonstrates the applicability of the device for use as a low-pressure H2 detector. Operando x-ray spectroscopy revealed that changes in H2-induced magnetism arose from a Co-Pd charge transfer effect coupled to changes in the local-structure symmetry.

AB - This paper reports on a magnetic device with a [Co40Pd60/Cu]10/Fe structure for use in the detection of H2. In a magneto-optical, transport, and gas-detection system, the proposed device presented sharp, reproducible H2-dependent magnetic/electrical properties. The device's saturation magnetization (induced resistance change) dropped (increased) by a factor of ∼5 when a H2 pressure of 75 kPa is given. Besides, the electrical signal-to-noise ratio of the device can be restored ∼50% by exposing it to a magnetic field of 1000 Oe, even when the sensitivity of the device dropped at a low H2 pressure (0.7 KPa). This demonstrates the applicability of the device for use as a low-pressure H2 detector. Operando x-ray spectroscopy revealed that changes in H2-induced magnetism arose from a Co-Pd charge transfer effect coupled to changes in the local-structure symmetry.

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Using magnetic structure of Co₄₀Pd₆₀/Cu for the sensing of hydrogen

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