EPR of Ag2+ in β-alumina

R. C. Barklie, K. O'Donnell, B. Henderson

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

EPR measurements have been made on Ag2+ in sodium beta -alumina single crystals. Silver is introduced into the conduction plane as Ag + by exchange with Na+ in amounts varying from 5 to 26%: Ag2+ is produced by X-ray irradiation at 300K. EPR results indicate that the Ag2+ occupies two sites of orthorhombic symmetry in the conduction plane. The measured g-values are gx=2.0230(2), g y=2.0678(15), gz=2.2730(5) and gx=2.015(4), gy=2.0580(15), gz=2.2335(4) where x, y, z are parallel to a*, c, a axes respectively. The hyperfine interaction with the 107Ag nuclei is unresolved and estimated to be less than 1 mT. No motional effects are observed. Models are discussed for the two sites which involve an excess of O2- ions in the conduction plane.

Original languageEnglish
Article number023
Pages (from-to)3881-3887
Number of pages7
JournalJournal of Physics C: Solid State Physics
Volume11
Issue number18
DOIs
Publication statusPublished - 1 Dec 1978

Keywords

  • sodium beta -alumina
  • EPR measurements
  • silver
  • X-ray irradiation

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