skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Transport properties of non-equilibrium metallic alloys

Abstract

A systematic and quantitative study of upper critical fields, H/sub C2/(T), in disordered bulk alloys with increasing atomic numbers was carried out. They include alloys of Ti-Mo, Ti-Pd, Zr-Mo, Zr-Pd, Zr-Rh, Hf-Mo, and Hf-Ta. A least-squares fitting routine was performed on H/sub C2/(T) with the Werthamer, Helfand, Hohenberg, and Maki theory of dirty superconductors. The localization effects on H/sub C2/(T) were examined by comparing the electronic density of states obtained from specific heat measurements (absence of field-induced delocalization effects) and those derived from fitting critical field data. Measurements on bulk Zr-Ni, Zr-Rh and Hf-Mo alloys gave the first direct confirmation of theoretical predictions on H/sub C2/(T) for the weakly localized 3D systems. To further test the localization theories, magnetoresistance was measured on amorphous Lu-Pd and Lu-Ni alloys. The author also investigated a wide compositional range of U-Fe, U-Co, and U-Ni metallic glasses which contain f-electrons. These uranium glasses exhibit unusual resistivity and superconducting behaviors and have very large upper-critical-field gradients.

Authors:
Publication Date:
Research Org.:
Virginia Univ., Charlottesville (USA)
OSTI Identifier:
6892698
Resource Type:
Thesis/Dissertation
Resource Relation:
Other Information: Thesis (Ph. D.)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BINARY ALLOY SYSTEMS; CRITICAL FIELD; METALLIC GLASSES; ELECTRIC CONDUCTIVITY; ATOMIC NUMBER; LEAST SQUARE FIT; MEASURING METHODS; SUPERCONDUCTORS; ALLOY SYSTEMS; ELECTRICAL PROPERTIES; MAGNETIC FIELDS; MAXIMUM-LIKELIHOOD FIT; NUMERICAL SOLUTION; PHYSICAL PROPERTIES; 360104* - Metals & Alloys- Physical Properties

Citation Formats

Wong, K M.M. Transport properties of non-equilibrium metallic alloys. United States: N. p., 1987. Web.
Wong, K M.M. Transport properties of non-equilibrium metallic alloys. United States.
Wong, K M.M. Thu . "Transport properties of non-equilibrium metallic alloys". United States.
@article{osti_6892698,
title = {Transport properties of non-equilibrium metallic alloys},
author = {Wong, K M.M.},
abstractNote = {A systematic and quantitative study of upper critical fields, H/sub C2/(T), in disordered bulk alloys with increasing atomic numbers was carried out. They include alloys of Ti-Mo, Ti-Pd, Zr-Mo, Zr-Pd, Zr-Rh, Hf-Mo, and Hf-Ta. A least-squares fitting routine was performed on H/sub C2/(T) with the Werthamer, Helfand, Hohenberg, and Maki theory of dirty superconductors. The localization effects on H/sub C2/(T) were examined by comparing the electronic density of states obtained from specific heat measurements (absence of field-induced delocalization effects) and those derived from fitting critical field data. Measurements on bulk Zr-Ni, Zr-Rh and Hf-Mo alloys gave the first direct confirmation of theoretical predictions on H/sub C2/(T) for the weakly localized 3D systems. To further test the localization theories, magnetoresistance was measured on amorphous Lu-Pd and Lu-Ni alloys. The author also investigated a wide compositional range of U-Fe, U-Co, and U-Ni metallic glasses which contain f-electrons. These uranium glasses exhibit unusual resistivity and superconducting behaviors and have very large upper-critical-field gradients.},
doi = {},
url = {https://www.osti.gov/biblio/6892698}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Thesis/Dissertation:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this thesis or dissertation.

Save / Share: