Phys. Rev. Lett. 103, 207002 (2009) [4 pages]Crossover Induced by Spin-Density-Wave Interference in the Coherence of Singlet Electron Pairs in CrReceived 4 June 2009; published 13 November 2009 To study the interaction of s-wave superconductivity with spin-density waves (SDWs), we have measured a series of Nb/Cr/Nb Josephson junctions and determined the coherence length ξ describing the decay of the critical current with Cr thickness, L. We observe a crossover in ξ from approximately 14 nm to 4 nm as L increases to 10 nm, which is consistent with a transition from commensurate to incommensurate SDWs expected for this thickness range. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.207002
DOI:
10.1103/PhysRevLett.103.207002
PACS:
85.25.Cp, 75.50.Ee, 75.30.Fv
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