Impact of electron-electron interactions induced by disorder at interfaces on spin-dependent tunneling in Co-Fe-B/MgO/Co-Fe-B magnetic tunnel junctions - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review B: Condensed Matter (1978-1997) Année : 2010

Impact of electron-electron interactions induced by disorder at interfaces on spin-dependent tunneling in Co-Fe-B/MgO/Co-Fe-B magnetic tunnel junctions

J Bernos
  • Fonction : Auteur
M Hehn
  • Fonction : Auteur
F Montaigne
C Tiusan
D Lacour
M Alnot
  • Fonction : Auteur
Béatrice Negulescu
G Lengaigne
  • Fonction : Auteur

Résumé

In this study, we demonstrate that, beyond the standard magnon excitations, the electron-electron interactions in presence of disorder in CoFeB electrodes play a significant role on the zero-bias anomaly measured in CoFeB/MgO/CoFeB junctions. The low-temperature dependence of the tunneling conductance presents cusp-like dip at low voltage varying as the square root of the bias voltage. The amplitude of this zero-bias anomaly decreases with the annealing temperature, indicating interface crystallization and related increase in the tunnel magnetoresistance.
Fichier principal
Vignette du fichier
10 PRB CoFeB.pdf (262.93 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02949068 , version 1 (25-09-2020)

Identifiants

Citer

J Bernos, M Hehn, F Montaigne, C Tiusan, D Lacour, et al.. Impact of electron-electron interactions induced by disorder at interfaces on spin-dependent tunneling in Co-Fe-B/MgO/Co-Fe-B magnetic tunnel junctions. Physical Review B: Condensed Matter (1978-1997), 2010, 82, pp.060405. ⟨10.1103/PhysRevB.82.060405⟩. ⟨hal-02949068⟩
14 Consultations
64 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More