In the last few years there has been a rediscovery of resonant diffraction, particularly in transition metals, in the soft x-ray regime. This has allowed a wavevector selective technique to probe the transition metal L edges, previously exploited by absorption based techniques. This resonant edge is directly sensitive to the 3d electrons in the transition metal, and thus is particularly important for studying magnetic, orbital and charge order. This has been exemplified through a number of studies of these phenomena in the manganites. Here, recent soft x-ray diffraction results of the rotation of orbital order in the bilayer manganite Pr(Sr[0.1]Ca[0.9])Mn(2)O(7) are shown. The importance of this technique has not been neglected at Diamond, and a new soft x-ray diffractometer (RASOR) will be commissioned at Diamond this summer. RASOR will be optimised both for diffraction and reflectivity measurements, and will be capable of low sample temperature, post scatter polarisation analysis, together with advanced sample environments such as applied magnetic and electric fields.
Diamond Light Source is the UK's national synchrotron science facility, located at the Harwell Science and Innovation Campus in Oxfordshire.
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