Response enhancement of a magnetic-film based hydrogen gas sensor using size reduction to microchip dimensions

Research output: Chapter in Book/Conference paperConference paperpeer-review

1 Citation (Scopus)

Abstract

We fabricated microchip-sized Hydrogen (H) gas sensor based on a thin film of Iron-Palladium (FePd) alloy and investigated its ferromagnetic resonance (FMR) response in ambient and H gas environments and at atmospheric pressure. The fabricated sensing FePd alloy layers were 30 nm thick and their composition was 52% Fe and 48% Pd. Broadband stripline FMR spectroscopy was used to study the magnetization dynamics as a function of the stripline width. A comparative study was conducted between the FMR response of the continuous film and the film of finite width. Our results suggest that a significant increase in the FMR response was recorded for the narrower width stripline (50μm) samples compared with the FMR response of continuous film samples. In addition, we observed that sample annealing in nitrogen environment enhanced the FMR response by a factor of two. Furthermore, a very strong FMR signal of 80 μV in amplitude was recorded for nitrogen-annealed samples which, according to our best knowledge, is the highest amplitude of the FMR response ever recorded for FePd films at reasonable microwave powers (10dBm). Such a significant enhancement in the FMR response is believed to be a step forward towards commercial availability of a magnetic H gas sensor.

Original languageEnglish
Title of host publication2018 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2018
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages19-21
Number of pages3
ISBN (Electronic)9781538695241
DOIs
Publication statusPublished - 2 Jul 2018
Event2018 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2018 - Perth, Australia
Duration: 9 Dec 201813 Dec 2018

Publication series

Name2018 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2018

Conference

Conference2018 Conference on Optoelectronic and Microelectronic Materials and Devices, COMMAD 2018
Country/TerritoryAustralia
CityPerth
Period9/12/1813/12/18

Fingerprint

Dive into the research topics of 'Response enhancement of a magnetic-film based hydrogen gas sensor using size reduction to microchip dimensions'. Together they form a unique fingerprint.

Cite this