  A noticeable magnetoresistive effect has been observed on
ferromagnet/superconductor/ferromagnet (FSF) microbridges based on diluted
ferromagnetic PdFe alloy containing as small as 1% magnetic atoms.
Microstructuring of the FSF trilayers does not destroy the effect: the most
pronounced curves were obtained on the smallest bridges of 6-8 um wide and
10-15 um long. Below the superconducting transition we are able to control the
critical current of microbridges by switching between P and AP orientations of
magnetizations of PdFe layers. The operation of FSF-bridge as a magnetic switch
is demonstrated in several regimes providing significant voltage discrimination
between digital states or remarkably low bit error rate.
