The distorted-fcc phase of samarium

18th APS-SCCM; 24th AIRAPT

Husband, R.J.^1 ; Loa, I.^1 ; Munro, K.^1 ; McMahon, M.I.^1,2

SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh

EH9 3JZ, United Kingdom^1

Research Complex at Harwell, Oxon, Didcot

OX11 0FA, United Kingdom^2

关键词: Angle dispersive X-ray powder diffraction;    FCC phase;    High pressure;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/3/032009/pdf
DOI  :  10.1088/1742-6596/500/3/032009

来源: IOP

【 摘 要 】

Angle-dispersive x-ray powder diffraction experiments were performed on samarium metal up to 50 GPa. We report that the high-pressure distorted-fcc phase has the same hR24 structure observed in praseodymium, but, unlike praseodymium, samarium does not undergo a transition to a second distorted-fcc phase. We also report a path-dependent transition to a new phase, the structure of which has not yet been determined, which occurs on annealing followed by pressure decrease.