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

Title: Scaling of the magnetization in magnetic fields up to 30 T of UCu[sub 5[minus]x]Pd[sub x]: Evidence for a crossover from correlated to single-ion magnetic interactions upon cooling

Abstract

Scaling of low-temperature magnetization data for the non-Fermi-liquid systems UCu[sub 4]Pd and UCu[sub 3.5]Pd[sub 1.5] in fields to 30 T is carried out to help determine the nature of the magnetic interactions above and below 10 K. The size of the scaling exponent [beta] found from this scaling with fields above 10 K implies that the higher-temperature magnetic excitations in UCu[sub 4]Pd are correlated, i.e., [beta][gt]1.0. For T[le]6 hthinsp;K, [beta][lt]1.0 for both UCu[sub 4]Pd and UCu[sub 3.5]Pd[sub 1.5] implying that the excitations may change and assume single-ion character, consistent with recent doping experiments. These results, which contradict a recent neutron-scattering study, may be understood theoretically as a depletion of the occupation of the phase space of magnetic excitations with decreasing temperature ( iff; energy), leading to a decoupling of the excitations. [copyright] [ital 1999] [ital The American Physical Society]

Authors:
;  [1];  [2];  [3]
  1. (Department of Physics, University of Florida, Gainesville, Florida 32611-8440 (United States))
  2. (NHMFL, Tallahassee, Florida 32310 (United States))
  3. (Department of Physics, University of Florida, Gainesville, Florida 32611-8440 (United States) Institut fuer Physik, Universitaet Augsburg, D-86159 Augsburg (Germany))
Publication Date:
OSTI Identifier:
6441631
Alternate Identifier(s):
OSTI ID: 6441631
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 60:9; Journal ID: ISSN 0163-1829
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COOLING; COPPER ALLOYS; CRYSTAL DOPING; FERMIONS; MAGNETIZATION; PALLADIUM ALLOYS; SCALING LAWS; TEMPERATURE RANGE 0000-0013 K; URANIUM ALLOYS; ACTINIDE ALLOYS; ALLOYS; PLATINUM METAL ALLOYS; TEMPERATURE RANGE 360104* -- Metals & Alloys-- Physical Properties

Citation Formats

Kim, J.S., Thomas, S., Hall, D., and Stewart, G.R. Scaling of the magnetization in magnetic fields up to 30 T of UCu[sub 5[minus]x]Pd[sub x]: Evidence for a crossover from correlated to single-ion magnetic interactions upon cooling. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.60.6761.
Kim, J.S., Thomas, S., Hall, D., & Stewart, G.R. Scaling of the magnetization in magnetic fields up to 30 T of UCu[sub 5[minus]x]Pd[sub x]: Evidence for a crossover from correlated to single-ion magnetic interactions upon cooling. United States. doi:10.1103/PhysRevB.60.6761.
Kim, J.S., Thomas, S., Hall, D., and Stewart, G.R. Wed . "Scaling of the magnetization in magnetic fields up to 30 T of UCu[sub 5[minus]x]Pd[sub x]: Evidence for a crossover from correlated to single-ion magnetic interactions upon cooling". United States. doi:10.1103/PhysRevB.60.6761.
@article{osti_6441631,
title = {Scaling of the magnetization in magnetic fields up to 30 T of UCu[sub 5[minus]x]Pd[sub x]: Evidence for a crossover from correlated to single-ion magnetic interactions upon cooling},
author = {Kim, J.S. and Thomas, S. and Hall, D. and Stewart, G.R.},
abstractNote = {Scaling of low-temperature magnetization data for the non-Fermi-liquid systems UCu[sub 4]Pd and UCu[sub 3.5]Pd[sub 1.5] in fields to 30 T is carried out to help determine the nature of the magnetic interactions above and below 10 K. The size of the scaling exponent [beta] found from this scaling with fields above 10 K implies that the higher-temperature magnetic excitations in UCu[sub 4]Pd are correlated, i.e., [beta][gt]1.0. For T[le]6 hthinsp;K, [beta][lt]1.0 for both UCu[sub 4]Pd and UCu[sub 3.5]Pd[sub 1.5] implying that the excitations may change and assume single-ion character, consistent with recent doping experiments. These results, which contradict a recent neutron-scattering study, may be understood theoretically as a depletion of the occupation of the phase space of magnetic excitations with decreasing temperature ( iff; energy), leading to a decoupling of the excitations. [copyright] [ital 1999] [ital The American Physical Society]},
doi = {10.1103/PhysRevB.60.6761},
journal = {Physical Review, B: Condensed Matter},
issn = {0163-1829},
number = ,
volume = 60:9,
place = {United States},
year = {1999},
month = {9}
}