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Impurity effects in superconducting UPt3 M. C. Aronson

Summary: Impurity effects in superconducting UPt3
M. C. Aronson
The Harrison M. Randall Laboratory of Physics,. The University of Michigan, Ann Arbor, Michigan 48109
T. Vorenkamp, Z. Koziol, A. de Visser, K. Bakker, and J. J. M. Franse
Natuurkundig Laboratorium der Universiteit van Amsterdam, Valckenierstraat 6.5, 1018 XE Amsterdam,
The Netherlands
J. L. Smith
Los Alamos National Laboratory, Los Alamos, New Mexico 87.54.5
Superconducting UPt, is characterized by a novel and complex magnetic field-temperature
phase diagram, with two superconducting transitions at Tel and Tc2in zero field. We
have studied the effects of Pd and Y impurities on the zero field superconducting properties
of UPt,. Resistance measurements show that both dopants increase the residual resistivity
and decrease the spin fluctuation temperature in the normal state. T,, is depressed by
both dopants, but more effectively by Pd. 1TCl - TC21is essentially unaffected by Y doping,
but increases dramatically with Pd doping.
Recently, much interest has centered on the determi-
nation and understanding of the complex field and temper-
ature dependent phase diagram of superconducting UPts.'
An extraordinary feature of the phase diagram is the ex-


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


Collections: Materials Science; Physics