Cerreta, Andrea Gaina, Roxana Nuccio, Laura Marozau, Ivan Sen, Kaushik De Andrés Prada, Roberto Sarkar, Subhrangsu Bernhard, Christian 2020-02-26 We studied how an additional layer of the high superconductor YBCO affects the magneto-transport across a LSMO/Alq3/Co spin-valve structure. We found that up to a thickness of at least 10 nm the YBCO layer on top of LSMO hardly changes the spin-valve effect, since the device resistance still depends on the relative orientation of the LSMO and Co magnetization. The spin-valve effect persists even when the superconducting YBCO layer acts as bottom electrode, with no spin-polarized current injected from LSMO into YBCO. This highlights that the charge carriers of a thin YBCO layer on top of LSMO are strongly spin-polarized, most likely due to a magnetic proximity effect involving a transfer of spin-polarized electrons from LSMO to YBCO. Evidence for a strongly underdoped state of the YBCO layers close to the interface with LSMO is indeed obtained from the dI/dV curves in zero magnetic field which reveal a pseudogap persisting well above . application/pdf https://folia.unifr.ch/global/documents/308409 https://folia.unifr.ch/documents/308409/files/ber_mtl.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1209/0295-5075/129/37002 info:eu-repo/semantics/openAccess License undefined EPL (Europhysics Letters). - 2020, vol. 129, no. 3, p. 37002 info:eu-repo/classification/udc/53 Magneto-transport in La2/3Sr1/3MnO3/YBa2Cu3O7/Alq3/Co spin-valves http://purl.org/coar/resource_type/c_6501