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Figure 9
In situ detected XANES spectra at the Nb K-edge measured during the exposure of a stack of two Nb foils (6 µm thickness each) to a nitro­gen atmosphere of 3 mbar at 900°C. The displayed spectra were recorded with 0.5 s per scan (1 Hz), and one spectrum is displayed every five minutes (colour code from dark blue via violet and red to orange with increasing time). The XANES spectrum of the NbN reference material is shown with an offset of +0.2 for a better comparison (green line). In the inset, the determined absorption edge position (defined as the first inflection point of the spectrum) is shown as a function of the exposure time, i.e. t = 0 corresponds to the start of the N2-exposure.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 1| January 2021| Pages 266-277
https://doi.org/10.1107/S1600577520013557
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