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Uranium based heavy fermion superconductors have attracted interest because of the opportunity to study the interplay between magnetism and superconductivity. All of these materials have been found to order anti-ferromagnetically with T(n)>T(e) with the exception of Ube(13) in which no neutron evidence for static magnetism has been reported. In experiments on single crystals at Riso national Laboratory, we have observed anti-ferromagnetic short range magnetic correlation situated at q=<0.5,0.5, 0>. Their breadth in q-space shows that the correlation's are short range; while the absence of a signal in certain directions suggests that the components we observe are longitudinally polarized with respect to their propagation vector. In energy space the correlation's extend to 2~meV and no signal is observable for T>30K. The remaining question concerns the energy dependence of this response around T(e).

Additional information

Bibliographic Reference: Paper presented: European Conference on Neutron Scattering ECNS, Budapest (HU), 1-4th September (1999)
Availability: Available from Public Relations and Publications Unit, Ispra (IT)
Record Number: 199911586 / Last updated on: 1999-11-13
Original language: en
Available languages: en
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