Mj. Cooper et al., COMPTON-SCATTERING STUDIES OF THE TEMPERATURE-DEPENDENCE OF THE SPIN MOMENT IN HOFE2, Physical review letters, 71(7), 1993, pp. 1095-1098
Compton scattering studies, performed at the KEK accumulation ring in
Japan with circularly polarized synchrotron radiation, have been used
to determine the spin-dependent Compton profile of HoFe2 at temperatur
es between 10 and 300 K. The holmium spin moment, which is antiferroma
gnetically coupled to that on the Fe sites, softens as the temperature
rises leading to a reversal of the net spin direction. This has been
observed directly and the spin compensation temperature has been estim
ated from the Compton data to be 210 +/- 10 K.