  A thin Co/Cu/Permalloy (Ni$_{80}$Fe$_{20}$) pseudo-spin-valve structure is
sandwiched between superconducting Nb contacts. When the current is passed
perpendicular to the plane of the film a Josephson critical current ($I_C$) is
observed at 4.2 K, in addition to a magnetoresistance (MR) of $\sim$ 0.5 % at
high bias. The hysteresis loop of the spin-valve structure can be cycled to
modulate the zero field $I_C$ of the junction in line with the MR measurements.
These modulations of resistance and $I_C$ occur both smoothly and sharply with
the applied field. For each type of behaviour there is a strong correlation
between shape of the MR loops and the $I_C$ modulation.
