1. Using magnetic structure of Co40Pd60/Cu for the sensing of hydrogen.
- Author
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Jaw-Yeu Liang, Yun-Chieh Pai, Tu-Ngoc Lam, Wen-Chin Lin, Ting-Shan Chan, Chih-Huang Lai, and Yuan-Chieh Tseng
- Subjects
GAS detectors ,COBALT compounds ,MAGNETOOPTICS ,MAGNETIC devices ,MAGNETIC structure ,HYDROGEN - Abstract
This paper reports on a magnetic device with a [Co
40 Pd60 /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 1000Oe, 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. [ABSTRACT FROM AUTHOR]- Published
- 2017
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