2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16622The magnetic field B_c, in which the electrons become fully spin-polarized, is found to be proportional to the deviation of the electron density from the zero-field metal-insulator transition in a two-dimensional electron system in silicon. The tendency of B_c to vanish at a finite electron density suggests a ferromagnetic instability in this strongly correlated electron system.4 pages, postscript figures included. Revised versionStrongly Correlated ElectronsMesoscale and Nanoscale Physicstext