38
R. Rüffer and A. I. Chumakov
Fig. 1.15 Left: time evolution of nuclear forward scattering for Ni at various pressures. The (red)
solid lines show the fit. The period of oscillations of the signal is inversely proportional to the
magnetic hyperfine splitting. Right: pressure dependence of the magnetic hyperfine field in Ni from
the experiment (solid black circles) and from fully relativistic ab initio calculations (open black
circles). Positive and negative contributions to the calculated field are shown as scalar relativistic
calculations (red open squares) and 3d orbital contribution (blue open diamonds). (Reprinted figure
with permission from [120], Copyright (2013) by the American Physical Society)
Fig. 1.16 The double-stage diamond anvil cell for ultra-high pressure generation. Semi-balls made
of nanocrystalline diamond (NCD) of extraordinary strength are attached to the culets of the opposed
gem quality diamonds of the DAC. A sample of osmium (Os), shown as a small red dot on the top
of the lower semi-ball, has a size of ca. 3 microns [122] (Image courtesy Elena Bykova, University
of Bayreuth)
R. Rüffer and A. I. Chumakov
Fig. 1.15 Left: time evolution of nuclear forward scattering for Ni at various pressures. The (red)
solid lines show the fit. The period of oscillations of the signal is inversely proportional to the
magnetic hyperfine splitting. Right: pressure dependence of the magnetic hyperfine field in Ni from
the experiment (solid black circles) and from fully relativistic ab initio calculations (open black
circles). Positive and negative contributions to the calculated field are shown as scalar relativistic
calculations (red open squares) and 3d orbital contribution (blue open diamonds). (Reprinted figure
with permission from [120], Copyright (2013) by the American Physical Society)
Fig. 1.16 The double-stage diamond anvil cell for ultra-high pressure generation. Semi-balls made
of nanocrystalline diamond (NCD) of extraordinary strength are attached to the culets of the opposed
gem quality diamonds of the DAC. A sample of osmium (Os), shown as a small red dot on the top
of the lower semi-ball, has a size of ca. 3 microns [122] (Image courtesy Elena Bykova, University
of Bayreuth)