Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network

  Advanced Search  

ELSEVIER Physica B 241 243 (1998) 859 861 Quantum critical scattering in uranium non-Fermi

Summary: ELSEVIER Physica B 241 243 (1998) 859 861
Quantum critical scattering in uranium non-Fermi
liquid compounds
R. Osborn a'*, M.C. Aronson b, B.D. Rainford c, M.B. Maple d,
R. Chau d, K.H. Andersen e
Materials Science Division, Argonne National Laboratoo,, Argonne, IL 60439. USA
b UnirersiO, ~),fMichigan, Ann Arbor, MI 48109, USA
Unil,ersiO, o["Southampton, Southampton SO17 IBJ, UK
a Unit,ersiO , q/'Calf[brnia, San Diego, CA 92093-0319, USA
lnstitut Laue-Langerin, 38042 Grenoble, b)'ance
Our recent observation of universal scaling in ~o/T of the magnetic response of the non-Fermi liquid compound
UCu5 xPdxprovides evidence ofsingle-impurity quantum critical fluctuations of the uranium 5f-electrons. The scaling is
observed over a wide range of frequencies from ~ 1 to 25 meV, and a wide range of temperatures from ~ 10 to 300 K,
with evidence of a cross-over to more conventional moment fluctuations above 25 meV. We now have evidence from
measurements with full polarization analysis of the development of antiferromagnetic correlations below 10 K in
UCu4Pd, but not in UCu3.sPdl. 5, indicating the cross-over from the quantum critical regime to a low-temperature
quantum-disordered regime as predicted by phenomenological theories of quantum phase transitions. ~! 1998
Published by Elsevier Science B.V. All rights reserved.


Source: Aronson, Meigan - Department of Physics and Astronomy, SUNY at Stony Brook


Collections: Materials Science; Physics