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Superconductivity and Magnetic Properties of High-Pressure Oxygen Synthesized Ru1−xSr2GdCu2+xO8-z Compounds

Published online by Cambridge University Press:  18 March 2011

P.W. Klamut ,
B. Dabrowski ,
M. Maxwell  and
J. Mais
P.W. Klamut
Affiliation:
Department of Physics, Northern Illinois University, DeKalb, IL 60115, U.S.A.
B. Dabrowski
Affiliation:
Department of Physics, Northern Illinois University, DeKalb, IL 60115, U.S.A.
M. Maxwell
Affiliation:
Department of Physics, Northern Illinois University, DeKalb, IL 60115, U.S.A.
J. Mais
Affiliation:
Department of Physics, Northern Illinois University, DeKalb, IL 60115, U.S.A.
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Abstract

We report on the new superconducting materials with the formula Ru1−xSr2GdCu2+xO8-z that have been synthesized under high-pressure oxygen conditions. By changing the ratio between Ru and Cu in the compound we were able to increase the temperature of the superconducting transition up to 72 K for x=0.3 and 0.4. Reentrant dependencies of the magnetization found at low temperatures are qualitatively explained assuming a quasi two-dimensional character of the superconducting regions. The magnetic characteristics of these compounds are discussed and compared to the existing data on RuSr2GdCu2O8 magnetic superconductor (Tc on=45K, TN=132 K).

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References

LITERATURE

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