Publication Date

1980

Document Type

Dissertation/Thesis

First Advisor

Kimball, Clyde W.

Degree Name

M.S. (Master of Science)

Legacy Department

Department of Physics

LCSH

Iron compounds; Mössbauer spectroscopy; Superconductors

Abstract

A Mössbauer study has been designed to use ⁵⁷Fe as an impurity probe in the superconducting compound Ho₁.₀Mo₆S₈ over the temperature range 4.3 K to 673 K. Although it has been determined by neutron diffraction that Fe occupies only one crystallographic site, the Mössbauer spectra obtained show two different electronic configurations for the ⁵⁷Fe impurity. At temperatures less than 30 K the spectra show a relaxing single line along with a quadrupole doublet which starts relaxing below 10 K. Above 50 K there appears to be diffusion of Fe atoms between the two sites. The intensity, shift, quadrupolar splitting and width were monitored in an effort to explain these anomalies m the behavior of ⁵⁷Fe in this Chevrel phase superconductor.

Comments

Includes bibliographical references.

Extent

iv, 31 pages

Language

eng

Publisher

Northern Illinois University

Rights Statement

In Copyright

Rights Statement 2

NIU theses are protected by copyright. They may be viewed from Huskie Commons for any purpose, but reproduction or distribution in any format is prohibited without the written permission of the authors.

Media Type

Text

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