Speaker
Prof.
Malcolm McMahon
(The University of Edinburgh)
Description
Prior to 2007, the highest pressure at which full single-crystal x-ray diffraction data had been collected and refined was 50GPa. However, building on developments at the SRS (Darsbury), we have pushed the use of such techniques first to 100GPa on Diamond [1] and, most recently, to 145 GPa at the ESRF [2]. The use of these techniques has revealed previously unimagined structural complexity in sodium [3], and the extremely high flux at the ESRF, and the micro-focussed x-ray beams, have also enabled us to collect extremely high quality data on weakly scattering samples such as Li, N2 and O2, including both high- and low-temperature studies. Representative results from all these studies will presented, and the prospects for future such studies on Petra III will be discussed.
[1] M.I. McMahon, E. Gregoryanz, L.F. Lundegaard, I. Loa, C. Guillaume,
R.J. Nelmes, A.K. Kleppe, M. Amboage, H. Wilhelm, and A.P. Jephcoat,
Proc. Nat. Acad. Sci. 104, 17297 (2007).
[2] L.F. Lundegaard, E. Gregoryanz, M.I. McMahon, C. Guillaume, I. Loa,
and R.J. Nelmes, Phys. Rev. B 79, 064105 (2009).
[3] E. Gregoryanz, L.F. Lundegaard, M.I. McMahon, C. Guillaume, R.J.
Nelmes, and M. Mezouar, Science 320, 1054 (2008).
Primary author
Prof.
Malcolm McMahon
(The University of Edinburgh)
