A polarised neutron scattering study of magnetic fluctuations in the heavy fermion superconductor CeCu<sub>2</sub>Si<sub>2</sub>
- Johnson, S.
- Bland, J.
- Brown, P.
- Benoit, A.
- Capellmann, H.
- Flouquet, J.
- Spille, H.
- Steglich, F.
- Ziebeck, K.
DOIAbstract
Magnetic fluctuations in CeCu2Si2 were directly observed, both above the superconducting transition temperatureT C as well as below. Spatial correlations of the magnetisation density belowT C are weak, resulting in an essentially wavevector independent magnetic response. The intensity observed within an energy window of ±5 THz centred on ω=0 THz corresponds to 1µ β per Ce atom. Higher energy excitations peaking between 7–10 THz were observed and are probably due to higher crystal field levels
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