The microscopic magnetisation of the superconductor PuCoGa5

The intermetallic compound PuCoGa5 is a superconductor with a surprisingly high critical temperature of 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 2...

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Detalhes bibliográficos
Autor principal: Hiess, A. (author)
Outros Autores: Stunault, A. (author), Colineau, E. (author), Rebizant, J. (author), Wastin, F. (author), Kernavanois, N. (author), McIntyre, G. J. (author), Fernandez-Diaz, M. T. (author), Lelièvre-Berna, E. (author), Paixão, J. A. (author), Lander, G. H. (author)
Formato: article
Idioma:eng
Publicado em: 2007
Assuntos:
Magnetic superconductor
Neutron diffraction
Strongly correlated electron system
Texto completo:http://hdl.handle.net/10316/4382
País:Portugal
Oai:oai:estudogeral.sib.uc.pt:10316/4382
Descrição
Resumo:The intermetallic compound PuCoGa5 is a superconductor with a surprisingly high critical temperature of 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 242PuCoGa5. 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.

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