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| Hauptseite > Publikationsdatenbank > Anomalous magnetoresistance driven by interfacial proximity insuperconductor/ferromagnet heterostructures |
| Hauptseite > Publikationsdatenbank > Anomalous magnetoresistance driven by interfacial proximity insuperconductor/ferromagnet heterostructures |
| Poster (Invited) | FZJ-2024-05809 |
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2024
Abstract: Proximity effects (PE) are emergent phenomena that occur at the interfaces of appropriately designedsuperconductor (SC)/ferromagnet (FM) thin films heterostructures. PE arise due to the strong correlationand electronic competition in the antagonist phase materials. PE have potential applicationsin spin-triplet Josephson Junctions that involve the manipulation of fluxons, such as superconductingQubits, for quantum computing [1–3]. Several types of PE were reported when consideringheterostructures based on conventional SC and FM with either in-plane or perpendicular magneticanisotropy (PMA). However, there are few contributions regarding PE in heterostructures based onhigh critical temperature (Tc) SC and FM with perpendicular magnetic anisotropy. SrRuO3 (SRO) isa suitable FM candidate due to its strong PMA with narrow domain walls, high spin-orbit coupling,anomalous Hall and Berry effects, and excellent lattice match with the high-Tc SC YBa2Cu3O7−x(YBCO). We report magnetotransport results of epitaxial YBCO/SRO and SRO/YBCO heterostructuresprepared on low miscut SrTiO3 (001) single crystals by high oxygen pressure sputtering. Wehave observed intriguing proximity effects characterized by (i) a reduction in the SC Tc and (ii) aninversion of the magnetoresistance (MR) signal at the superconductivity onset. We suggest that thechange in the MR signal is related to the competition between the FM and SC states within bothsamples. In addition, features in the MR curves that may be attributed to weak localization andantilocalization effects at the YBCO/SRO and SRO/YBCO interfaces were observed. Such featurescould be correlated to the high Ru deficiency in the SRO films and to a possible orbital reconstructionat the interfaces, which will be further investigated by synchrotron and neutron scattering techniques.This study enhances our understanding of the intricate relationship between magnetism andsuperconductivity in high-Tc SC/FM systems, illuminating potential future materials for quantumelectronics.[1] Sedlmayr, N., & Levchenko, A., Solid State Communications, 327, 114221 (2021).[2] Dua, A., Malomed, B., Cheng, M., & Jiang, L., Physical Review B, 100, 144508 (2019).[3] Klenov, N. V., Kuznetsov, A. V., Soloviev, I. I., Bakurskiy, S. V., Denisenko, M. V., & Satanin, A. M.,Low Temperature Physics, 43, 789-798 (2017).
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