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Superconducting Behavior of Tetragonal T ‘Eu2‐xCexO4±δ

Published online by Cambridge University Press:  28 February 2011

V. J. Melim ,
Weimin Peng ,
C.W. Kimball ,
B. Dabrowski ,
Y. Zheng  and
D. G. Hinks
V. J. Melim
Affiliation:
Physics Department, Northern Illinois University, DeKalb, Illinois 60115
Weimin Peng
Affiliation:
Physics Department, Northern Illinois University, DeKalb, Illinois 60115
C.W. Kimball
Affiliation:
Physics Department, Northern Illinois University, DeKalb, Illinois 60115
B. Dabrowski
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
Y. Zheng
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
D. G. Hinks
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439
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Abstract

Eu2.xCexCuO4±δ (0 ≤ x ≤ 0.17) has been synthesized with the tetragonal T’ structure. AC susceptibility and resistance measurements show that Eu2‐xCexCuO4±δ becomes superconducting with τc∼13 K for x= 0.15 and 0.17, when prepared under reducing conditions. The 151Eu Mossbauer shift shows that the Euvalence falls into a narrow range near Eu 3+ . The temperature dependence of the Mossbauer absorption yields a Debye temperature of 319 K for the Eu ion in Eu1.85Ce0.15CuO4±δ

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 165
Copyright
Copyright © Materials Research Society 1990

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