Spinterface effects in hybrid La$_{0.7}$Sr$_{0.3}$MnO$_3$ /SrTiO$_3$ /C$_{60}$ /Co magnetic tunnel junctions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue ACS Applied Electronic Materials Année : 2022

Spinterface effects in hybrid La$_{0.7}$Sr$_{0.3}$MnO$_3$ /SrTiO$_3$ /C$_{60}$ /Co magnetic tunnel junctions

Résumé

The orbital hybridization at the Co/C$_{60}$ interface has proved to strongly enhance the magnetic anisotropy of the cobalt layer, promoting such hybrid systems as appealing components for sensing and memory devices. Correspondingly, the same hybridization induces substantial variations in the ability of Co/C$_{60}$ interface to support spin polarized currents and can bring out spin filtering effect. The knowledge of the effects at both sides shall allow for a better and more complete understanding of interfacial physics. In this paper we investigate the Co/C$_{60}$ bilayer in the role of spin polarized electrode in the La$_{0.7}$Sr$_{0.3}$MnO$_3$ /SrTiO$_3$ /C$_{60}$ /Co configuration, thus substituting the bare Co electrode in the well-known La$_{0.7}$Sr$_{0.3}$MnO$_3$ /SrTiO$_3$ /C$_{60}$ /Co magnetic tunnel junction. The study revealed that the spin polarization (SP) of the tunneling currents escaping from the Co/C 60 electrode is generally negative, i.e. inverted with respect to the expected SP of the Co electrode. The observed sign of the spin polarization was confirmed via DFT calculations by considering the hybridization between cobalt and molecular orbitals.
Fichier principal
Vignette du fichier
C60_spinvalve.pdf (2.96 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03763775 , version 1 (29-08-2022)

Licence

Paternité

Identifiants

Citer

Ilaria Bergenti, Takeshi Kamiya, Dongzhe Li, Alberto Riminucci, Patrizio Graziosi, et al.. Spinterface effects in hybrid La$_{0.7}$Sr$_{0.3}$MnO$_3$ /SrTiO$_3$ /C$_{60}$ /Co magnetic tunnel junctions. ACS Applied Electronic Materials, 2022, ⟨10.1021/acsaelm.2c00300⟩. ⟨hal-03763775⟩
48 Consultations
36 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More