Neutron Magnetic From Factor and Radial Density of4fElectrons inTb3+: Experiment and Theory

Abstract

The magnetic form factor of ${\mathrm{Tb}}^{3+}$ in the compound Tb${\mathrm{}\left(\mathrm{OH}\right)\mathrm{}}_3$ has been measured with polarized neutrons. The experiment was performed on a single crystal in the ferromagnetically ordered state (8.9${\mathrm{\mu }}_{\mathit{B}}$/Tb) at 2.6 °K. The theoretical form factor, calculated from a fully relativistic mixed-configuration solution of the Dirac-Fock equations, is found to be in excellent agreement with experiment.