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J. Phys. Soc. Jpn. 75S (2006) pp. 30-32  |Previous Article| |Next Article|  |Table of Contents|
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Proc. of 5th Int. Symposium on ASR-WYP-2005 – Advances in the Physics and Chemistry of Actinide Compounds –

f-Electron Localized/Itinerant Crossover in ACoGa5 (A = U, Np, Pu, Am)

E. D. Bauer1, P. Boulet2, J. Rebizant2, P. Javorský2,3, E. Colineau2, F. Wastin2, J. C. Griveau2, J. L. Sarrao1, J. D. Thompson1, L. A. Morales1 and G. H. Lander2

1Los Alamos National Laboratory, Los Alamos, NM 87545, U.S.A.
2European Commission, Joint Research Centre, Institute for Transuranium Elements Postfach 2340, 76125 Karlsruhe, Germany
3Charles University, Faculty of Mathematics and Physics, Department of Electronic Structures, Ke Karlovu 5, 12116 Prague 2, The Czech Republic

Measurements of magnetic susceptibility, specific heat, and electrical resistivity have been performed on the ACoGa5 (A = U, Np, Pu, Am) series. The electrical resistivity of UCoGa5 and PuCoGa5 can be scaled upon the ρ(T) data of the heavy-fermion superconductor CeCoIn5 indicating a single spin fluctuation energy scale dominates the transport properties. The physical properties of the ACoGa5 materials suggest the PuCoGa5 superconductor resides near an itinerant/localized crossover of the 5f electrons and is remarkably similar to the one that occurs in the light actinide elements.

URL: http://jpsj.ipap.jp/link?JPSJS/75S/30/
DOI: 10.1143/JPSJS.75S.30


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