A. Schenck et al., PRESSURE-INDUCED COLLAPSE OF THE 4F-ELECTRON INDUCED MU(-KNIGHT SHIFTIN SM0.9LA0.1S()), Hyperfine interactions, 104(1-4), 1997, pp. 209-213
The pressure dependence of the mu(+)-Knight shift in the pseudo-binary
compound Sm0.9La0.1S has been studied with the aim to verify microsco
pically the quenching of paramagnetism by the formation and condensati
on of excitons in the insulating regime. A collapse of the mu(+)-Knigh
t shift is indeed observed but it is not restricted to the insulating
phase and may not reflect the bulk-magnetic response.