Experimental evidence of interface resonance states in single-crystal magnetic tunnel junctions

Journal Article · Tue Jul 15 00:00:00 EDT 2008 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.78.033301· OSTI ID:21143593

Zermatten, P -J; Gaudin, G; Maris, G; Miron, M; Schuhl, A; Tiusan, C; Greullet, F; Hehn, M ^[1]

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1. SPINTEC, URA2512 CEA-CNRS, INAC 1005 Building, 17 rue des Martyrs, 38054 Grenoble Cedex 9 (France)

All solid-state tunnel spectroscopy experiments performed on single-crystal Fe/MgO/Fe magnetic tunnel junctions show sharp features at 0.2 and 1.1 V. These peaks are observed on the electrical differential conductivity only in the antiparallel magnetic configuration and only for the voltage sign corresponding to the injection of electrons toward the bottom electrode. They are attributed to the conductivity of two different resonant states of the Fe(001)/MgO bottom interface. The analysis of the attenuation of these peaks as a function of the insulator thickness provides information on their symmetry.

• OSTI ID: 21143593
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 78, Issue 3; Other Information: DOI: 10.1103/PhysRevB.78.033301; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ELECTRIC CONDUCTIVITY
ELECTRIC POTENTIAL
ELECTRODES
ELECTRONS
ENERGY LEVELS
FERROMAGNETIC MATERIALS
INTERFACES
IRON
MAGNESIUM OXIDES
MAGNETISM
MONOCRYSTALS
ROUGHNESS
SPECTROSCOPY
SPIN
SUPERCONDUCTING JUNCTIONS
SYMMETRY
TUNNEL EFFECT