EQUILIBRIUM SCALING LAWS FOR LAYERED SPIN-GLASSES

We consider a system of parallel layers of a metallic spin glass (such as CuMn) of width w separated by nonmagnetic layers (Cu) of width l. Within the context of a one-parameter renormalization group descriptio n we derive scaling laws for the critical temperature as a function of w and l, and for the correlation length as a function of w, l, and th e temperature T. An essential role is played by a crossover length sca le L(cr) beyond which the interlayer coupling becomes important. This static study is a preliminary to the study of dynamic phenomena in lay ered spin glasses.