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Hyperfine Interactions

, Volume 120, Issue 1–8, pp 545–550 | Cite as

Electron–nucleus interactions in highly doped rare earth phosphate glasses

  • I.P. Goudemond
  • G.J. Hill
  • J.M. Keartland
  • M.J.R. Hoch
  • G.A. Saunders
Article

Abstract

31P NMR measurements have been used to study the dynamics of magnetic rare earth ions in the stable metaphosphate systems (R2O3)x(X2O3)0.25-x(P2O5)0.75, with R≡Er3+, Nd3+ and Gd3+, for varying concentrations x, where X denotes a nonmagnetic rare earth buffer. Broad EPR spectra are observable at liquid helium temperatures but it is not possible to measure the paramagnetic relaxation time directly. Electronic relaxation parameters and crystal field splittings have been inferred from the NMR relaxation data. Nuclei situated near paramagnetic ion sites experience shifts in resonance frequency due to the local field produced by the ion. The nuclear resonance line is inhomogeneously broadened with decreasing temperature and disappears abruptly at temperatures which depend on the magnetic ion present, its concentration and the magnitude of the applied magnetic field. A discussion of the line broadening process is presented.

Keywords

Spin Diffusion Nucleus Interaction Lattice Relaxation Time Nuclear Resonance Moment Ratio 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Kluwer Academic Publishers 1999

Authors and Affiliations

  • I.P. Goudemond
    • 1
  • G.J. Hill
    • 1
  • J.M. Keartland
    • 1
  • M.J.R. Hoch
    • 1
  • G.A. Saunders
    • 2
  1. 1.Department of PhysicsUniversity of the WitwatersrandSouth Africa
  2. 2.School of PhysicsUniversity of BathClaverton Down, BathUK

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