Perturbed-angular-correlation measurements of trivalent indium defects in silver chloride

J. C. Austin, M. L. Swanson, W. C. Hughes, C. T. Kao, L. M. Slifkin, H. C. Hofsäss, E. C. Frey

Research output: Contribution to journalArticle

Abstract

The interaction of vacancies with trivalent In111 ions in AgCl was studied by the perturbed - angular-correlation (PAC) method. Measurements at 77 K showed that the In111 ions occurred predominantly in two well-defined lattice defects, characterized by electric field gradients (EFGs) having frequencies Q1=21.5 MHz and Q2=43 MHz, each having axial symmetry, and each having its largest principle axis (zz) component in 100 directions. Two possible In-vacancy complexes are proposed for defect 1. The In ion, occupying a Ag lattice site, may be bound either to a single vacancy at a next-nearest Ag (1,0,0) site, or to two vacancies occupying next-nearest Ag sites at right angles with respect to the In ion. Defect 2 is attributed to a linear In-vacancy complex in which two vacancies occupy next-nearest Ag sites on opposite sides of the substitutional In site, e.g., at (1,0,0) and (-1,0,0) sites with respect to the In ion. Calculations of EFGs arising from these configurations, using a point-charge model, agree well with the measured EFGs.

Original languageEnglish (US)
Pages (from-to)7699-7705
Number of pages7
JournalPhysical Review B
Volume42
Issue number13
DOIs
StatePublished - Jan 1 1990
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics

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    Austin, J. C., Swanson, M. L., Hughes, W. C., Kao, C. T., Slifkin, L. M., Hofsäss, H. C., & Frey, E. C. (1990). Perturbed-angular-correlation measurements of trivalent indium defects in silver chloride. Physical Review B, 42(13), 7699-7705. https://doi.org/10.1103/PhysRevB.42.7699