  A novel method invented to measure the minute thermodynamic spin
magnetization of dilute two dimensional fermions is applied to electrons in a
silicon inversion layer. Interplay between the ferromagnetic interaction and
disorder enhances the low temperature susceptibility up to 7.5 folds compared
with the Pauli susceptibility of non-interacting electrons. The magnetization
peaks in the vicinity of the density where transition to strong localization
takes place. At the same density, the susceptibility becomes extremely close to
that of free spins (Curie susceptibility), indicating an almost perfect
compensation of the kinetic energy toll associated with spin polarization by
the energy gained from the ferromagnetic correlation. Yet, the balance favors a
paramagnetic phase over spontaneous magnetization.
