Abstract

The induced magnetic density of the enhanced Pauli paramagnet YNi 5 has been measured by polarized neutron diffraction at 100 K and in an applied field of 48 kOe. The magnetic density is localized on Ni sites where a 3d form factor, similar to that of Ni metal, is observed. The induced Ni moment is different for the two crystallographic sites: (2.4 ± 0.6) × 10 -3 μ B on Ni I on the 2c site and (4.1 ± 0.8) × 10 -3 μ B on Ni II on the 3g site. This difference must be associated with the difference of the Y surroundings of each site. The results are discussed from the band structure of the alloy.

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