Kimball, Clyde W.
M.S. (Master of Science)
Department of Physics
Iron compounds; Superconductors; Mössbauer spectroscopy
A Mossbauer effect study was designed to use ⁵⁷Fe as an impurity probe in the superconducting Chevrel phase compound Dy₁.₀Mo₆S₈ over the temperature range 0.43 K to 300 K. The material produced, Dy₁.₀⁵⁷Fe₀.₀₅Mo₆S₈, was found to be single phase within 1-2% by analysis of X-ray powder diffraction patterns. The Mossbauer spectra show at least two different Fe sites. At 80 K and below the spectra show a six line magnetic pattern along with-an asymmetric quadrupole doublet. At 20 K and below the doublet becomes magnetically split as well. At 200 K and above the lines are broadened, indicating diffusion of the Fe atoms. Comparisons are made with results from other Chevrel phase studies in order to understand our results.
Stahulak, Michael D., "Mössbauer study of the Chevrel Phase Compound Dy₁.₀Fe.₀₅Mo₆S₈" (1983). Graduate Research Theses & Dissertations. 4014.
Northern Illinois University
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