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Europhysics Letters (EPL) 78 (2007) 57008
Role of self-irradiation defects on the ageing of 239PuCoGa5
Frédéric Jutier1, Jean-Christophe Griveau1, Cornelis Jacominus Van Der Beek2, Eric Colineau1, Franck Wastin1, Jean Rebizant1, Pascal Boulet1, Thierry Wiss1, Hartmut Thiele1, Eric Simoni3
(31/05/2007)

Low-temperature accumulation and annealing experiments, in conjunction with electrical resistivity and critical current density measurements, were used to study the ageing of the actinide superconductor PuCoGa5. These measurements reveal that 2-nm sized non-superconducting point-like regions are the main damage formed during room temperature ageing; smaller point-like defect were irrelevant to transport properties. Defect sizes and densities deduced from experiment agree with Transmission Electron Micoscopy observations.
1 :  ITU - Institute for Transuranium Elements
2 :  LSI - UMR 7642 - Laboratoire des Solides Irradiés
3 :  IPNO - Institut de Physique Nucléaire d'Orsay
Physique/Matière Condensée/Supraconductivité
Supraconductivité – Actinides – Matériaux à corrélations fortes – ancrage de vortex – irradiation – défauts ponctuels – Superconductivity – Strongly correlated electron systems – flux pinning – point defects
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