Journal
PHYSICAL REVIEW B
Volume 91, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.91.060501
Keywords
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Funding
- EPSRC [EP/J01060X, EP/J010626/1, EP/J010650/1, EP/J010634/1, EP/J010618/1]
- JEOL Europe
- ISIS Neutron and Muon Source
- RFBR [13-02-01452-a, 14-02-90018 BEL-a]
- Engineering and Physical Sciences Research Council [EP/J010634/1, EP/J010618/1, EP/J010650/1, EP/G011230/1, EP/J01060X/1, EP/J010626/1] Funding Source: researchfish
- EPSRC [EP/J010634/1, EP/J01060X/1, EP/J010650/1, EP/G011230/1, EP/J010618/1, EP/J010626/1] Funding Source: UKRI
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Transport measurements are presented on thin-film superconducting spin-valve systems, where the controlled noncollinear arrangement of two ferromagnetic Co layers can be used to influence the superconducting state of Nb. We observe a very clear oscillation of the superconducting transition temperature with the relative orientation of the two ferromagnetic layers. Our measurements allow us to distinguish between the competing influences of domain averaging, stray dipolar fields, and the formation of superconducting spin triplets. Domain averaging is shown to lead to a weak enhancement of transition temperature for the antiparallel configuration of exchange fields, while much larger changes are observed for other configurations, which can be attributed to drainage currents due to spin triplet formation.
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