  The magnetic response of a proximity-coupled superconductor-normal metal
sandwich is studied within the framework of the quasiclassical theory. The
magnetization is evaluated for finite values of the applied magnetic field
(linear and nonlinear response) at arbitrary temperatures and is used to fit
recent experimental low-temperature data. The hysteretic behavior predicted
from a Ginzburg-Landau approach and observed in experiments is obtained within
the quasiclassical theory and shown to exist also outside the Ginzburg-Landau
region.
