title: Unidirectional Spin-Dependent Molecule-Ferromagnet Hybridized States Anisotropy in Cobalt Phthalocyanine Based Magnetic Tunnel Junctions.
abstract: Organic or molecular spintronics is a rising field of research at the frontier between condensed matter physics and chemistry. It aims to mix spin physics and the richness of chemistry towards designing new properties for spin electronics devices through engineering at the molecular scale. Beyond the expectation of a long spin lifetime, molecules can be also used to tailor the spin polarization of the injected current through the spin-dependent hybridization between molecules and ferromagnetic electrodes. In this Letter, we provide direct evidence of a hybrid interface spin polarization reversal due to the differing hybridization between phthalocyanine molecules and each cobalt electrode in Co/CoPc/Co magnetic tunnel junctions. Tunnel magnetoresistance and anisotropic tunnel magnetoresistance experiments show that interfacial hybridized electronic states have a unidirectional anisotropy that can be controlled by an electric field and that spin hybridization at the bottom and top interfaces differ, leading to an inverse tunnel magnetoresistance.
authors.affiliation: Unité Mixte de Physique CNRS/Thales, 1, Avenue A. Fresnel, 91767 Palaiseau, France and Université Paris Sud, 91405 Orsay, France.
authors.forename: Clément
authors.initials: C
authors.lastname: Barraud
authors.affiliation: Unité Mixte de Physique CNRS/Thales, 1, Avenue A. Fresnel, 91767 Palaiseau, France and Université Paris Sud, 91405 Orsay, France.
authors.forename: Karim
authors.initials: K
authors.lastname: Bouzehouane
authors.affiliation: Unité Mixte de Physique CNRS/Thales, 1, Avenue A. Fresnel, 91767 Palaiseau, France and Université Paris Sud, 91405 Orsay, France.
authors.forename: Cyrile
authors.initials: C
authors.lastname: Deranlot
authors.affiliation: Unité Mixte de Physique CNRS/Thales, 1, Avenue A. Fresnel, 91767 Palaiseau, France and Université Paris Sud, 91405 Orsay, France.
authors.forename: Stéphane
authors.initials: S
authors.lastname: Fusil
authors.affiliation: IPCMS, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess BP 43, 67034 Strasbourg, France.
authors.forename: Hashim
authors.initials: H
authors.lastname: Jabbar
authors.affiliation: IPCMS, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess BP 43, 67034 Strasbourg, France.
authors.forename: Jacek
authors.initials: J
authors.lastname: Arabski
authors.affiliation: IPCMS, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess BP 43, 67034 Strasbourg, France.
authors.forename: Rajib
authors.initials: R
authors.lastname: Rakshit
authors.affiliation: IPCMS, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess BP 43, 67034 Strasbourg, France.
authors.forename: Dong-Jik
authors.initials: DJ
authors.lastname: Kim
authors.affiliation: IPCMS, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess BP 43, 67034 Strasbourg, France.
authors.forename: Christophe
authors.initials: C
authors.lastname: Kieber
authors.affiliation: IPCMS, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess BP 43, 67034 Strasbourg, France.
authors.forename: Samy
authors.initials: S
authors.lastname: Boukari
authors.affiliation: IPCMS, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess BP 43, 67034 Strasbourg, France.
authors.forename: Martin
authors.initials: M
authors.lastname: Bowen
authors.affiliation: IPCMS, Université de Strasbourg, CNRS UMR 7504, 23 rue du Loess BP 43, 67034 Strasbourg, France.
authors.forename: Eric
authors.initials: E
authors.lastname: Beaurepaire
authors.affiliation: Unité Mixte de Physique CNRS/Thales, 1, Avenue A. Fresnel, 91767 Palaiseau, France and Université Paris Sud, 91405 Orsay, France.
authors.forename: Pierre
authors.initials: P
authors.lastname: Seneor
authors.affiliation: Unité Mixte de Physique CNRS/Thales, 1, Avenue A. Fresnel, 91767 Palaiseau, France and Université Paris Sud, 91405 Orsay, France.
authors.forename: Richard
authors.initials: R
authors.lastname: Mattana
authors.affiliation: Unité Mixte de Physique CNRS/Thales, 1, Avenue A. Fresnel, 91767 Palaiseau, France and Université Paris Sud, 91405 Orsay, France.
authors.forename: Frédéric
authors.initials: F
authors.lastname: Petroff