Journal
SCIENCE
Volume 329, Issue 5987, Pages 59-61Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1189246
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Funding
- St. John's College, Cambridge
- UK Engineering and Physical Sciences Research Council [EP/E026206, EP/E026532/1, EP/D001536/1]
- Engineering and Physical Sciences Research Council [EP/F016611/1, EP/E026206/1] Funding Source: researchfish
- EPSRC [EP/E026206/1, EP/F016611/1] Funding Source: UKRI
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The superconductor-ferromagnet proximity effect describes the fast decay of a spin-singlet supercurrent originating from the superconductor upon entering the neighboring ferromagnet. After placing a conical magnet (holmium) at the interface between the two, we detected a long-ranged supercurrent in the ferromagnetic layer. The long-range effect required particular thicknesses of the spiral magnetically ordered holmium, consistent with spin-triplet proximity theory. This enabled control of the electron pairing symmetry by tuning the degree of magnetic inhomogeneity through the thicknesses of the holmium injectors.
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