A tunnel junction element having a ferromagnetic free layer, an insulating film and a ferromagnetic fixed layer for reducing current required for effecting a spin-injection magnetization reversal behavior in the tunnel junction element, wherein the ferromagnetic free layer includes a first and second ferromagnetic layers, between which a nonmagnetic metal layer is provided, the nonmagnetic metal layer being capable of keeping magnetic linkage between the first and second ferromagnetic layers and affecting no influence over crystal growth of the respective first and second ferromagnetic layers, and the first and second ferromagnetic layers are characterized in that the first ferromagnetic layer is disposed so as to come into contact with the insulating layer, and the second ferromagnetic layer is less magnetized than the first ferromagnetic layer.