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@INPROCEEDINGS{deOliveiraLima:1045593,
      author       = {de Oliveira Lima, Vitor Alexandre and Faley, Michael and
                      Bednarski-Meinke, Connie and Kentzinger, Emmanuel and
                      Brückel, Thomas},
      title        = {{A}nomalous magnetoresistance driven by interfacial
                      proximity in {YBCO}/{SRO} and {SRO}/{YBCO} heterostructures},
      reportid     = {FZJ-2025-03549},
      year         = {2025},
      abstract     = {The strong correlation and electronic competition in
                      superconductor (SC)/ferromagnet (FM) lead to the appearance
                      of proximity effects in appropriately designed SC/FM thin
                      film heterostructures. Proximity effects emerge at the
                      interface and have different length scales depending on the
                      materials properties. Recently, proximity effects with
                      different characteristics have been reported when
                      considering heterostructures based on conventional SC and FM
                      with either in-plane or perpendicular magnetic anisotropy
                      (PMA). However, there are few contributions regarding
                      proximity effects in heterostructures based on high critical
                      temperature (Tc) SC and FM with PMA. Such effects are of
                      strong interest for applications in spin-triplet Josephson
                      Junctions that involve the manipulation of fluxons, such as
                      superconducting Qubits, for quantum computing and in the
                      development of quantum electronics [1–4]. SrRuO3 (SRO) is
                      a 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). In this work, we report morphologic,
                      structural, magnetic and magnetotransport results of
                      epitaxial YBCO/SRO and SRO/YBCO heterostructures prepared on
                      low miscut SrTiO3 (001) single crystals using high oxygen
                      pressure sputtering. We have observed proximity effects
                      characterized by (i) a reduction in the SC Tc and (ii) an
                      anomalous magnetoresistance (MR) near the superconductivity
                      onset. We suggest that the change in the MR signal may be
                      related to the competition between the FM and SC states of
                      SRO and YBCO, respectively. Additionally, the MR curves
                      shape at low fields resemble weak localization and
                      antilocalization effects characteristic of semiconductors
                      and topologic insulators at low temperature [5]. Such
                      features may be correlated to the high Ru deficiency in the
                      SRO layer and to a possible orbital reconstruction at the
                      interfaces, which will be further investigated by
                      synchrotron and neutron scattering techniques. This study
                      advances our understanding of the intricate relationship
                      between magnetism and superconductivity in high-Tc SC/FM
                      systems, while illuminating potential future materials for
                      quantum electronics.References:[1] Sedlmayr, N., $\&$
                      Levchenko, A.: Solid State Communications, 327, 114221
                      (2021).[2] Dua, A., et al.: Physical Review B, 100, 144508
                      (2019).[3] Klenov, N. V., et al.: Low Temperature Physics,
                      43, 789-798 (2017). [4] Cuoco and A. Di Bernardo.: APL
                      Materials 10 (2022).[5] H.-Z. Lu and S.-Q. Shen,
                      Spintronics, 9167, 263–273 (2014).},
      month         = {Feb},
      date          = {2025-02-19},
      organization  = {Conference on Superconductivity and
                       Functional Oxides, L'Aquila (Italy), 19
                       Feb 2025 - 21 Feb 2025},
      subtyp        = {Invited},
      cin          = {JCNS-2 / JARA-FIT / ER-C-1},
      cid          = {I:(DE-Juel1)JCNS-2-20110106 / $I:(DE-82)080009_20140620$ /
                      I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
                      Research (JCNS) (FZJ) (POF4-6G4)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/1045593},
}