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Title

Ferroelectric Control of Interface Spin Filtering in Multiferroic Tunnel Junctions

AuthorsTornos, J.; Gallego, F.; Valencia, S.; Liu, Y.H.; Rouco, V.; Lauter, V.; Abrudan, R.; Luo, C.; Ryll, H.; Wang, Q.; Hernandez-Martin, D.; Orfila, G.; Cabero, M.; Cuellar, F.; Arias, D.; Mompean, F. J. ; García-Hernández, M. ; Radu, F.; Charlton, T.R.; Rivera-Calzada, A.; Sefrioui, Z.; Te Velthuis, S.G.E.; Leon, C.; Santamaria, J.
KeywordsLa0.7Sr0.3MnO3
BaTiO3
La0.7Sr0.3MnO3
Issue Date2019
PublisherAmerican Physical Society
CitationPhysical Review Letters 122 (2019)
Abstract[EN] The electronic reconstruction occurring at oxide interfaces may be the source of interesting device concepts for future oxide electronics. Among oxide devices, multiferroic tunnel junctions are being actively investigated as they offer the possibility to modulate the junction current by independently controlling the switching of the magnetization of the electrodes and of the ferroelectric polarization of the barrier. In this Letter, we show that the spin reconstruction at the interfaces of a La0.7Sr0.3MnO3/BaTiO3/La0.7Sr0.3MnO3 multiferroic tunnel junction is the origin of a spin filtering functionality that can be turned on and off by reversing the ferroelectric polarization. The ferroelectrically controlled interface spin filter enables a giant electrical modulation of the tunneling magnetoresistance between values of 10% and 1000%, which could inspire device concepts in oxides-based low dissipation spintronics.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.122.037601
URIhttp://hdl.handle.net/10261/218133
Identifiersdoi: 10.1103/PhysRevLett.122.037601
e-issn: 1079-7114
issn: 0031-9007
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