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Superconductivity Near Ferromagnetism in MgCNi3

Published online by Cambridge University Press:  01 February 2011

H. Rosner ,
R. Weht ,
M. Johannes ,
W.E. Pickett  and
E. Tosatti
H. Rosner
Affiliation:
Department of Physiscs, University of California, Davis CA 95616
R. Weht
Affiliation:
Department de Física, CNEA, Avda. General Paz y constiuyentes, 1650- san Martín, Argentina ICTP, P.O Box 586 34014 Trieste, Italy
M. Johannes
Affiliation:
Department of Physiscs, University of California, Davis CA 95616
W.E. Pickett
Affiliation:
Department of Physiscs, University of California, Davis CA 95616
E. Tosatti
Affiliation:
ICTP, P.O Box 586 34014 Trieste, Italy SISSA and INFM/SISSA, Via Beirut 2-4, 34014 Trieste, Italy
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Abstract

Superconductivity and ferromagnetism have been believed to be incompatible over any extended temperature range until certain specific examples - RuSr2GdCu2O8 and UGe2- have arisen in the past 2-3 years. The discovery of superconductivity above 8 K in MgCNi3, which is primarily the ferromagnetic element Ni and is strongly exchange-enhanced, provides a probable new and different example. This compound is shown here to be near ferromagmnetism, requiring only hole-doping by 12% substitution of Mg by Na or Li. This system will provide the means to prode coupling, and possible coexistence, of these two forms of collective behavior without the requirement of pressure.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 718: Symposium D – Perovskite Materials , 2002 , D11.3
Copyright
Copyright © Materials Research Society 2002

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