1H NMR spectra and h-site occupancy in Zr0.5CuyNi0.5-yH1 metallic glasses

G. Lasanda, P. Bánki, K. Tompa

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2 Citations (Scopus)

Abstract

Proton magnetic resonance spectra of Zr0.5CuyNi0.5-yH1 metallic glass samples with 0 ≤ y ≤ 0.3 were measured in the temperature range 77 K to 400 K and at 8, 28.5, 87.6 and 88.5 MHz frequencies. The data of the free-induction decay (FID) signal were compiled and Fourier transformed by a SMIS NMR spectrometer. The temperature dependence of the line shapes shows three distinctly different features: (i) in the temperature range 400 K to 270 K the spectrum is a motionally narrowed Lorentzian line; (ii) in the temperature range 270 K to 140 K the spectrum consists of a narrow Lorentzian component and a substantially wider Gaussian one; (iii) in the temperature range 140 K to 77 K, the spectrum is a "two-peaked" line. The distance between the two peaks (splitting) was found to be independent of the temperature and the frequency, that means that the low-temperature spectrum is probably the Pake doublet of hydrogen pairs. From the analysis of the splitting of the Pake doublet, a proton-proton distance of 0.167 nm was estimated. This distance corresponds to a transition metal mediated hydrogen pairing.

Original languageEnglish
Pages (from-to)665-668
Number of pages4
JournalSolid State Communications
Volume87
Issue number8
DOIs
Publication statusPublished - Aug 1993

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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