Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions

G. X. Du; S. G. Wang; Q. L. Ma; Yan Wang; R. C.C. Ward; X. G. Zhang; C. Wang; A. Kohn; X. F. Han

doi:10.1103/PhysRevB.81.064438

Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions

G. X. Du, S. G. Wang, Q. L. Ma, Yan Wang, R. C.C. Ward, X. G. Zhang, C. Wang, A. Kohn, X. F. Han

Research output: Contribution to journal › Article › peer-review

39 Scopus citations

Abstract

Low-voltage spin-dependent tunneling spectroscopy of an epitaxial Fe/MgO/Fe magnetic tunnel junction is measured and compared to first-principles calculation of the tunneling conductance. The measured dynamic conductance (dI/dV) in the parallel configuration shows distinct asymmetric features as a function of the bias voltage. The peaks are independent of barrier thickness, magnetic field, and temperature. With the help of the first-principles calculations, positive and negative bias spectra can be related to different types of Fe/MgO interfaces.

Original language	English
Article number	064438
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	81
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.81.064438
State	Published - 26 Feb 2010
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.81.064438

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title = "Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions",

abstract = "Low-voltage spin-dependent tunneling spectroscopy of an epitaxial Fe/MgO/Fe magnetic tunnel junction is measured and compared to first-principles calculation of the tunneling conductance. The measured dynamic conductance (dI/dV) in the parallel configuration shows distinct asymmetric features as a function of the bias voltage. The peaks are independent of barrier thickness, magnetic field, and temperature. With the help of the first-principles calculations, positive and negative bias spectra can be related to different types of Fe/MgO interfaces.",

author = "Du, \{G. X.\} and Wang, \{S. G.\} and Ma, \{Q. L.\} and Yan Wang and Ward, \{R. C.C.\} and Zhang, \{X. G.\} and C. Wang and A. Kohn and Han, \{X. F.\}",

year = "2010",

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day = "26",

doi = "10.1103/PhysRevB.81.064438",

language = "English",

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T1 - Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions

AU - Du, G. X.

AU - Wang, S. G.

AU - Ma, Q. L.

AU - Wang, Yan

AU - Ward, R. C.C.

AU - Zhang, X. G.

AU - Wang, C.

AU - Kohn, A.

AU - Han, X. F.

PY - 2010/2/26

Y1 - 2010/2/26

N2 - Low-voltage spin-dependent tunneling spectroscopy of an epitaxial Fe/MgO/Fe magnetic tunnel junction is measured and compared to first-principles calculation of the tunneling conductance. The measured dynamic conductance (dI/dV) in the parallel configuration shows distinct asymmetric features as a function of the bias voltage. The peaks are independent of barrier thickness, magnetic field, and temperature. With the help of the first-principles calculations, positive and negative bias spectra can be related to different types of Fe/MgO interfaces.

AB - Low-voltage spin-dependent tunneling spectroscopy of an epitaxial Fe/MgO/Fe magnetic tunnel junction is measured and compared to first-principles calculation of the tunneling conductance. The measured dynamic conductance (dI/dV) in the parallel configuration shows distinct asymmetric features as a function of the bias voltage. The peaks are independent of barrier thickness, magnetic field, and temperature. With the help of the first-principles calculations, positive and negative bias spectra can be related to different types of Fe/MgO interfaces.

UR - https://www.scopus.com/pages/publications/77954823807

U2 - 10.1103/PhysRevB.81.064438

DO - 10.1103/PhysRevB.81.064438

M3 - Article

AN - SCOPUS:77954823807

SN - 1098-0121

VL - 81

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 6

M1 - 064438

ER -

Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions

Abstract

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