  The first direct evidence of an induced spin moment in Gd(62.4)Y(37.6) is
presented. This additional moment, of 0.16 +/- 0.03 Bohr magnetons, arises from
polarisation of Y electrons in the alloy. The moment was detected in a Compton
scattering experiment via the measurement of the one dimensional projection of
the momentum space electron spin density in Gd and in the alloy. The result is
consistent with theoretical predictions calculated using the LMTO method within
the local spin density approximation.
