Journal Article

FZJ-2022-02176

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Resonant neutron reflectometry for hydrogen detection

Guasco, L.Extern* ; Khaydukov, Y. N.Extern* ; Pütter, S.FZJ* ; Silvi, L.Extern* ; Paulin, M. A.Extern* ; Keller, T.Extern* ; Keimer, B. (Corresponding author)Extern*

2022
Nature Publishing Group UK [London]

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Please use a persistent id in citations: http://hdl.handle.net/2128/31450  doi:10.1038/s41467-022-29092-z

Abstract: The detection and quantification of hydrogen is becoming increasingly important in research on electronic materials and devices, following the identification of the hydrogen content as a potent control parameter for the electronic properties. However, establishing quantitative correlations between the hydrogen content and the physical properties of solids remains a formidable challenge. Here we report neutron reflectometry experiments on 50 nm thick niobium films during hydrogen loading, and show that the momentum-space position of a prominent waveguide resonance allows tracking of the absolute hydrogen content with an accuracy of about one atomic percent on a timescale of less than a minute. Resonance-enhanced neutron reflectometry thus allows fast, direct, and non-destructive measurements of the hydrogen concentration in thin-film structures, with sensitivity high enough for real-time in-situ studies.

Keyword(s): Energy (1st) ; Magnetism (2nd) ; Materials Science (2nd)

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Contributing Institute(s):

1. JCNS-4 (JCNS-4)
2. Heinz Maier-Leibnitz Zentrum (MLZ)

Research Program(s):

1. 6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ) (POF4-6G4) (POF4-6G4)
2. 622 - Detector Technologies and Systems (POF4-622) (POF4-622)

Experiment(s):

1. MBE-MLZ: Molecular Beam Epitaxy at MLZ
2. NREX: Neutron reflectometer with X-ray option (NL1)

Appears in the scientific report 2022

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