Thermal Expansion Effects in Electrical Transport in Amorphous Metals
Abstract
Theoretical treatments of electrical transport in amorphous metals are usually performed at constant volume, although most experimental studies are performed at constant pressure. Recent studies of the influence of pressure on the electrical resistivity of a variety of amorphous metals indicate that thermal expansion effects can not be ignored in a theoretical description of the temperature dependence of the isobaric resistivity. In this report, general ideas pertinent to a theoretical description of non-isochoric electrical transport are presented. Results for isobaric electrical transport based on the Gruneisen theory of thermal expansion, which are independent of the model employed to treat isochoric transport, are also given. The implications of the theory are illustrated in the context of the diffraction model by: (1) detailed results specific to the well-characterized low resistivity alloy, a-Mg7Zn3; and (2) a selection of model calculations incorporating thermal expansion effects for cases with positive and negative pressure coefficients of resistivity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1985
- Accession Number
- ADA152477
Entities
People
- Lawrence V. Meisel
- Paul J. Cote
Organizations
- United States Army Armament Research, Development and Engineering Center