Described herein is a Stirling cycle cryogenic cooler comprising: a first magnetic circuit and a second magnetic circuit for generating a field of magnetic flux; the first magnetic circuit and the second magnetic circuit having a shared magnetic gap and the first magnetic circuit further having an additional magnetic gap; a first coil disposed in the shared magnetic gap; and a second coil disposed in the additional magnetic gap, said second coil being mounted for independent movement relative to said first coil. Also described herein is a method of cooling using the Stirling cycle cryogenic cooler.