π magnetic states of ferromagnet/superconductor superlattices
Yu. N. Proshin, Yu. A. Izyumov, M. G. Khusainov
DOI 10.1103/PhysRevB.64.064522 · Physical Review B
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Abstract
For the ferromagnetic metal/superconductor (FM/S) superlattices, 0π and ππ states with antiferromagnetic ordering of the FM layers magnetizations are predicted. If the S layer thickness ds is less than the threshold value dsπ, these states have a higher critical temperature Tc than the earlier known ferromagnetic states 00 and π0. Therefore, the Tc oscillation origin at ds<dsπ is due to the 0π−ππ−0π phase transition cascade, whereas at ds>dsπ it is related to the sequence of transitions 00−π0−00. A type of logical device combining the advantages of the superconducting and magnetic recording channels in one sample is offered on the FM/S superlattice base.
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