Evidence for spin-triplet superconducting correlations in metal-oxide heterostructures with non-collinear magnetization
| Autor: | Khaydukov, Yu. N., Ovsyannikov, G. A., Sheyerman, A. E., Constantinian, K. Y., Mustafa, L., Keller, T., Uribe-Laverde, M. A., Kislinskii, Yu. V., Shadrin, A. V., Kalabukhov, A., Keimer, B., Winkler, D. |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | Phys. Rev. B 90, 035130 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevB.90.035130 |
| Popis: | Heterostructures composed of ferromagnetic La0.7Sr0.3MnO3, ferromagnetic SrRuO3, and superconducting YBa2Cu3Ox were studied experimentally. Structures of composition Au/La0.7Sr0.3MnO3/SrRuO3/YBa2Cu3Ox were prepared by pulsed laser deposition, and their high quality was confirmed by X-ray diffraction and reflectometry. A non-collinear magnetic state of the heterostructures was revealed by means of SQUID magnetometry and polarized neutron reflectometry. We have further observed superconducting currents in mesa-structures fabricated by deposition of a second superconducting Nb layer on top of the heterostructure, followed by patterning with photolithography and ion-beam etching. Josephson effects observed in these mesa-structures can be explained by the penetration of a triplet component of the superconducting order parameter into the magnetic layers. Comment: 10 pages, 6 figures |
| Databáze: | arXiv |
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