Pulsed neutron Laue diffraction studies of the magnetic structures of holmium and terbium

We report elastic magnetic neutron diffraction measurements on the rare earth metals holmium and terbium, using the white-beam SXD diffractometer at the ISIS pulsed neutron source (Rutherford Appleton Laboratory). Holmium, which has been studied extensively in previous neutron and X-ray investigations, was employed in exploratory measurements to examine the viability of the instrument. In addition, the extended Q range of SXD was used to compare theoretical and experimental results for the magnetic form factor of holmium beyond the range of former triple-axis experiments. Subsequent measurements on terbium were then carried out, including a re-determination of the sub-lattice magnetisation exponent β. ((orig.))