Emergent spin filter at the interface between ferromagnetic and insulating layered oxides

We report a strong effect of interface-induced magnetization on the transport properties of magnetic tunnel junctions consisting of ferromagnetic manganite La_(0.7)Ca_(0.3)MnO_(3) and insulating cuprate PrBa_(2)Cu_(3)O_(7). Contrary to the typically observed steady increase of the tunnel magnetoresi...

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Detalhes bibliográficos
Autores: Liu, Yaohua, Cuéllar Jiménez, Fabian Andrés, Sefrioui, Zouhair, Freeland, J. W., Fitzsimmons, M. R., León Yebra, Carlos, Santamaría Sánchez-Barriga, Jacobo, te Velthuis, S. G. E.
Formato: artículo
Fecha de publicación:2013
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/34772
Acesso em linha:https://hdl.handle.net/20.500.14352/34772
Access Level:acceso abierto
Palavra-chave:537
Metallic ferromagnetic
Tunnel-junctions
Transport
Magnetism
Films.
Electricidad
Electrónica (Física)
2202.03 Electricidad
Descrição
Resumo:We report a strong effect of interface-induced magnetization on the transport properties of magnetic tunnel junctions consisting of ferromagnetic manganite La_(0.7)Ca_(0.3)MnO_(3) and insulating cuprate PrBa_(2)Cu_(3)O_(7). Contrary to the typically observed steady increase of the tunnel magnetoresistance with decreasing temperature, this system exhibits a sudden anomalous decrease at low temperatures. Interestingly, this anomalous behavior can be attributed to the competition between the positive spin polarization of the manganite contacts and the negative spin-filter effect from the interface-induced Cu magnetization.

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