ID08 User Guide

Status

Operational since February 2001 (former ID12B 1995-2000)

Scientific applications

ID8 is an intense source of polarized soft x-rays which are principally used to probe magnetism in a diverse range of systems such as nanoclusters, superconductors, semimetals and ultrathin films. The beamline is equipped with a low temperature 7T superconducting magnet, a spin-polarized photoemission spectrometer and a rapid field flipping chamber. The principal techniques used are x-ray magnetic circular dichroism (XMCD), spin-polarized x-ray photoelectron spectroscopy (SPXPS), x-ray emission spectroscopy (XES) and soft x-ray resonant magnetic scattering (XRMS).

The dispersive optics of the beamline were formerly part of ID12B, but in December 2000 these optics were moved to ID8 which is equipped with two new APPLE II undulators and new front end optics comprising CVD SiC mirrors. The photon energy is tunable in the range 0.4-1.6 keV, with an energy resolution close to DE/E=5x10^-4 at 850eV, making it ideal for studying the magnetic properties of transition metals and rare earths.

X-ray Absorption Spectroscopy (XAS) and X-ray Magnetic Circular Dichroism (XMCD) recorded from 0.015ML Co on K/Cu(111). The results prove that the giant magnetic moments observed for these systems arises from the atomic nature of the impurity transition metal in the alkali host. P. Gambardella, S.S. Dhesi, S. Gardonio, C. Grazioli, P. Ohresser, and C. Carbone, Phys. Rev. Lett. 88, 047202 (2002)

If you would like more information about using ID8, or would like to apply for beamtime on ID8, please contact Dr. Nick Brookes or Dr. Sarnjeet Dhesi.