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Title: Low-temperature magnetization study of U/sub 6/X (X = Mn,Fe,Co,Ni) compounds

Abstract

Magnetization and susceptibility measurements have been performed on U/sub 6/Fe and U/sub 6/Co at temperatures 4 K< or =T< or =290 K and applied magnetic fields 10/sup -2/ T< or =H< or =5 T. Low-temperature magnetization measurements at H = 10/sup -2/ T were also made on U/sub 6/Mn, U/sub 6/Ni, and U/sub 6/Mn/sub 0.5/Co/sub 0.5/. All of these materials have strongly paramagnetic, weakly-temperature-dependent susceptibilities at T< or =290 K. Low-field magnetization and metallography results provide information concerning the nature of small concentrations of ferromagnetic impurity phases found in all of the samples studied. An analysis of the data with use of paramagnon models implies that all of the U/sub 6/X compounds are strongly-exchange-enhanced paramagnets. Recent Fermi-liquid models are discussed in relation to predictions of p-wave superconductivity, exchange-enhanced paramagnetism, and electron localization in heavy-fermion systems. An empirical correlation is examined between the ratio of the total magnetic susceptibility to the electronic specific heat and the occurrence of either superconductivity or ferromagnetism for a broad class of metallic solids. The correlation suggests that the U/sub 6/X compounds are near the boundary between superconducting and ferromagnetic ground states.

Authors:
; ; ;
Publication Date:
Research Org.:
Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
OSTI Identifier:
5565552
Resource Type:
Journal Article
Journal Name:
Phys. Rev. B: Condens. Matter; (United States)
Additional Journal Information:
Journal Volume: 31:11
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; URANIUM ALLOYS; MAGNETIZATION; MANGANESE ALLOYS; IRON ALLOYS; NICKEL ALLOYS; BINARY ALLOY SYSTEMS; ELECTRONIC SPECIFIC HEAT; EXCHANGE INTERACTIONS; INTERMETALLIC COMPOUNDS; MAGNETIC SUSCEPTIBILITY; PARAMAGNETISM; SUPERCONDUCTIVITY; VERY LOW TEMPERATURE; ACTINIDE ALLOYS; ALLOY SYSTEMS; ALLOYS; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; INTERACTIONS; MAGNETIC PROPERTIES; MAGNETISM; PHYSICAL PROPERTIES; SPECIFIC HEAT; THERMODYNAMIC PROPERTIES; 360104* - Metals & Alloys- Physical Properties; 656102 - Solid State Physics- Superconductivity- Acoustic, Electronic, Magnetic, Optical, & Thermal Phenomena- (-1987)

Citation Formats

DeLong, L E, Guertin, R P, Hasanain, S, and Fariss, T. Low-temperature magnetization study of U/sub 6/X (X = Mn,Fe,Co,Ni) compounds. United States: N. p., 1985. Web. doi:10.1103/PhysRevB.31.7059.
DeLong, L E, Guertin, R P, Hasanain, S, & Fariss, T. Low-temperature magnetization study of U/sub 6/X (X = Mn,Fe,Co,Ni) compounds. United States. https://doi.org/10.1103/PhysRevB.31.7059
DeLong, L E, Guertin, R P, Hasanain, S, and Fariss, T. Sat . "Low-temperature magnetization study of U/sub 6/X (X = Mn,Fe,Co,Ni) compounds". United States. https://doi.org/10.1103/PhysRevB.31.7059.
@article{osti_5565552,
title = {Low-temperature magnetization study of U/sub 6/X (X = Mn,Fe,Co,Ni) compounds},
author = {DeLong, L E and Guertin, R P and Hasanain, S and Fariss, T},
abstractNote = {Magnetization and susceptibility measurements have been performed on U/sub 6/Fe and U/sub 6/Co at temperatures 4 K< or =T< or =290 K and applied magnetic fields 10/sup -2/ T< or =H< or =5 T. Low-temperature magnetization measurements at H = 10/sup -2/ T were also made on U/sub 6/Mn, U/sub 6/Ni, and U/sub 6/Mn/sub 0.5/Co/sub 0.5/. All of these materials have strongly paramagnetic, weakly-temperature-dependent susceptibilities at T< or =290 K. Low-field magnetization and metallography results provide information concerning the nature of small concentrations of ferromagnetic impurity phases found in all of the samples studied. An analysis of the data with use of paramagnon models implies that all of the U/sub 6/X compounds are strongly-exchange-enhanced paramagnets. Recent Fermi-liquid models are discussed in relation to predictions of p-wave superconductivity, exchange-enhanced paramagnetism, and electron localization in heavy-fermion systems. An empirical correlation is examined between the ratio of the total magnetic susceptibility to the electronic specific heat and the occurrence of either superconductivity or ferromagnetism for a broad class of metallic solids. The correlation suggests that the U/sub 6/X compounds are near the boundary between superconducting and ferromagnetic ground states.},
doi = {10.1103/PhysRevB.31.7059},
url = {https://www.osti.gov/biblio/5565552}, journal = {Phys. Rev. B: Condens. Matter; (United States)},
number = ,
volume = 31:11,
place = {United States},
year = {1985},
month = {6}
}