Origin of the inverse spin-switch behavior in manganite/cuprate/manganite trilayers

We studied ferromagnet/superconductor/ferromagnet trilayers based on La_(0.7)Ca_(0.3)MnO_(3) manganite and YBa_(2)Cu_(3)O_(7−δ) (YBCO) high-T_(c) cuprate with magnetoresistance and magnetization measurements. We find an inverse superconducting spin-switch behavior, where superconductivity is favored...

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Detalles Bibliográficos
Autores: Nemes, Norbert Marcel, García Hernández, M., te Velthuis, S. G. E., Hoffmann, A., Visani, C., Garcia Barriocanal, Javier, Peña, V., Arias Serna, Diego, Sefrioui, Zouhair, León Yebra, Carlos, Santamaría Sánchez-Barriga, Jacobo
Tipo de recurso: artículo
Fecha de publicación:2008
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/51403
Acceso en línea:https://hdl.handle.net/20.500.14352/51403
Access Level:acceso abierto
Palabra clave:537
Superconductor
Ferromagnet
Junctions
Imbalance.
Electricidad
Electrónica (Física)
2202.03 Electricidad
Descripción
Sumario:We studied ferromagnet/superconductor/ferromagnet trilayers based on La_(0.7)Ca_(0.3)MnO_(3) manganite and YBa_(2)Cu_(3)O_(7−δ) (YBCO) high-T_(c) cuprate with magnetoresistance and magnetization measurements. We find an inverse superconducting spin-switch behavior, where superconductivity is favored for parallel alignment of the magnetization in the ferromagnetic layers. We argue that this inverse superconducting spin switch originates from the transmission of spin-polarized carriers into the superconductor. In this picture, the thickness dependence of the magnetoresistance yields the spin-diffusion length in YBCO as 13 nm. A comparison of bilayers and trilayers allows ruling out the effect of the stray fields of the domain structure of the ferromagnet as the source of the inverse superconducting spin switch.

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