Temperature dependence of the field induced magnetic form factor of CeSn3

Abstract

Polarized neutron scattering techniques have been used to study the spatial distribution and temperature dependence of the magnetization induced in a single crystal of CeSn₃ by a magnetic field of 42.5 kG. We find that in the 300–40 K temperature range the measured form factor is in good agreement with the free ion 4f magnetic form factor of Ce³⁺. Below 40 K large deviations from a 4f magnetic form factor were observed. A satisfactory fit to the data below 40 K can be obtained by assuming that the induced magnetization contains a large component of 5d electronic character of e_g symmetry.