  In this letter we report a direct observation of a magnetic proximity effect
in an amorphous thin film exchange-spring magnet by the use of neutron
reflectometry. The exchange-spring magnet is a trilayer consisting of two
ferromagnetic layers with high $T_c$'s separated by a ferromagnetic layer,
which is engineered to have a significantly lower $T_c$ than the embedding
layers. This enables us to measure magnetization depth profiles at which the
low $T_c$ material is in a ferromagnetic or paramagnetic state, while the
embedding layers are ferromagnetic. A clear proximity effect is observed 7 K
above the $T_c$ of the embedded layer, with a range extending 50
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