Observation of antiferromagnetic correlations in UBe13
- Author(s): Neumann, KU;
- Capellmann, H;
- Fisk, Z;
- Smith, JL;
- Ziebeck, KRA
- et al.
Published Web Locationhttps://doi.org/10.1016/0038-1098(86)90259-0
The wavevector and energy dependence of the paramagnetic response in the normal phase of the Heavy Fermion system UBe13 has been investigated between 10 K and 300 K using polarized neutrons and polarization analysis. At 10 K the response was found to be enhanced at non zero wave-vectors indicating the presence of strong antiferromagnetic correlations. The peaks in the scattering occured at positions expected for incipient type G antiferromagnetism of the simple cubic uranium sublattice. At room temperature the spatial correlations completely disappeared and the response was wave vector independent. Constant Q scans carried out at 10 K confirmed the Lorentzian dependence proposed by Goldman et al. . © 1986.