Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 310, Issue 2, Pages 709-711Publisher
ELSEVIER
DOI: 10.1016/j.jmmm.2006.10.275
Keywords
magnetic superconductor; neutron diffraction; strongly correlated electron system
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The intermetallic compound PuCoGa5 is a superconductor with a surprisingly high critical temperature of T-sc = 18 K in which the superconductivity has been suggested to arise from magnetic fluctuations. We investigated the microscopic magnetic properties by polarised neutron diffraction on a single crystal of (PuCoGa5)-Pu-242. An induced moment is observed on both the Pu and the Co sites. The total magnetisation is significantly smaller than previously reported in agreement with recent magnetisation measurements. This result challenges the currently discussed models for the superconductivity in this weakly magnetic compound. (c) 2006 Elsevier B. V. All rights reserved.
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