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Pressure Effect on the Superconductivity of AnTGa5 Systems and Americium Metal (An=Np, Pu, Am - T=Co, Rh, Ir)

Published online by Cambridge University Press:  26 February 2011

Jean-Christophe Griveau ,
Jean Rebizant ,
Franck Wastin ,
Eric Colineau ,
Frédéric Jutier  and
Gerard H. Lander
Jean-Christophe Griveau
Affiliation:
griveau@itu.fzk.de, ITU-JRC, Postfach 2340, Karlsruhe, N/A, N/A, Germany
Jean Rebizant
Affiliation:
rebizant@itu.fzk.de, ITU-JRC, Germany
Franck Wastin
Affiliation:
wastin@itu.fzk.de, ITU-JRC, Germany
Eric Colineau
Affiliation:
colineau@itu.fzk.de, ITU-JRC, Germany
Frédéric Jutier
Affiliation:
Frederic.jutier@itu.fzk.de, ITU-JRC, Germany
Gerard H. Lander
Affiliation:
lander@ill.fr, ITU-JRC, Germany
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Abstract

We report pressure studies on the magnetic and superconducting properties of PuTGa5 (T=Co, Rh) and Americium metal down to 0.4K. Recent discovery of superconductivity in the Plutonium based compounds PuTGa5 (T=Co, Rh) has shed a new light on the study of Actinides compounds. The fact that these systems present lots of similarities with the CeTIn5 (T=Co, Rh, Ir) must not hide some fascinating features of these materials: they display superconducting characteristics one order of magnitude higher than their Cerium counterparts or all 5f Superconducting Heavy. Moreover they present at ambient pressure a Non Fermi Liquid described by a T4/3 law which seems to maintain up to the highest pressure achieved (∼20 GPa) for the 2 Plutonium superconductors. Finally we report superconducting pressure diagram of americium metal under pressure up to 27 GPa and down to 0.4K. The complex superconducting diagram Tc(p) related to the several phases transition led us to examine the localization delocalization aspect of the 5f electrons in this metal through the Mott transition.

Keywords

actinidesuperconductingmagnetic properties
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 893: Symposium JJ – Actinides 2005 – Basic Science, Applications and Technology , 2005 , 0893-JJ02-03
Copyright
Copyright © Materials Research Society 2006

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References

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