Jp. Rueff et al., Magnetic and structural alpha-epsilon phase transition in Fe monitored by x-ray emission spectroscopy, PHYS REV B, 60(21), 1999, pp. 14510-14512
The iron structural and magnetic transition between the magnetic (bcc-alpha
) and the nonmagnetic (hcp-epsilon) phases has been studied monitoring the
pressure dependence of the Fe-K beta fluorescence line excited with monochr
omatic synchrotron radiation. The relative intensity of the two multiplets
shows an S-shaped pressure curve with flex point at the known transition pr
essure of 130 kbar. The S width of approximate to 30 kbar also coincides wi
th the one determined in structural determinations, and in magnetism studie
s using Mossbauer techniques. This shows how the x-ray emission method can
be used to probe the local magnetic properties of atoms under extreme therm
odynamic conditions. [S0163-1829(99)03745-5].