Anomalous anisotropic behaviour of spin-triplet proximity effect in Au/SrRuO3/Sr2RuO4 junctions

Spin-polarized supercurrents can be generated with magnetic inhomogeneity at a ferromagnet/spin-singlet-superconductor interface. In such systems, complex magnetic inhomogeneity makes it difficult to functionalise the spin-polarized supercurrents. However, spin-polarized supercurrents in ferromagnet...

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Bibliographic Details
Published in:Scientific reports 2019-11, Vol.9 (1), p.1-8, Article 15827
Main Authors: Anwar, M. S., Kunieda, M., Ishiguro, R., Lee, S. R., Sow, C., Robinson, J. W. A., Yonezawa, S., Noh, T. W., Maeno, Y.
Format: Article
Language:English
Subjects:
142/126
639/301/1005/1007
639/301/119/544
639/766/119/1003
Anisotropy
Humanities and Social Sciences
Magnetic fields
Magnetism
multidisciplinary
Science
Science (multidisciplinary)
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Summary:Spin-polarized supercurrents can be generated with magnetic inhomogeneity at a ferromagnet/spin-singlet-superconductor interface. In such systems, complex magnetic inhomogeneity makes it difficult to functionalise the spin-polarized supercurrents. However, spin-polarized supercurrents in ferromagnet/spin-triplet-superconductor junctions can be controlled by the angle between magnetization and spin of Copper pairs (d-vector), that can effectively be utilized in developing of a field of research known as superconducting spintronics. Recently, we found induction of spin-triplet correlation into a ferromagnet SrRuO 3 epitaxially deposited on a spin-triplet superconductor Sr 2 RuO 4 , without any electronic spin-flip scattering. Here, we present systematic magnetic field dependence of the proximity effect in Au/SrRuO 3 /Sr 2 RuO 4 junctions. It is found that induced triplet correlations exhibit strongly anisotropic field response. Such behaviour is attributed to the rotation of the d-vector of Sr 2 RuO 4 . This anisotropic behaviour is in contrast with the vortex dynamic. Our results will stimulate study of interaction between ferromagnetism and unconventional superconductivity.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-52003-0