pi magnetic states of ferromagnet/superconductor superlattices - art. no. 064522

For the ferromagnetic metal/superconductor (FM/S) superlattices, 0 pi and p i pi states with antiferromagnetic ordering of the FM layers magnetizations are predicted. If the S layer thickness d(s) is less than the threshold va lue d(s)(pi) these states have a higher critical temperature T-c than the e arlier known ferromagnetic states 00 and pi0. Therefore, the T-c oscillatio n origin at d(s)< d(s)(pi) is due to the 0 pi-pi pi -0 pi phase transition cascade, whereas at d(s)>d(s)(pi) it is related to the sequence of transiti ons 00-pi0-00. A type of logical device combining the advantages of the sup erconducting and magnetic recording channels in one sample is offered on th e FM/S superlattice base.