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 $$V$$. The peaks are independent of barrier thickness, magnetic field, and temperature. From the first-principles calculation, we identify the positive and negative bias spectra corresponding to different types of Fe/MgO interfaces. Tunneling spectroscopy thus can be used as a powerful tool for interface characterization.
- Authors:
-
- Institute of Physics, Chinese Academy of Science
- University of Oxford
- ORNL
- Publication Date:
- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 979268
- DOE Contract Number:
- DE-AC05-00OR22725
- Resource Type:
- Journal Article
- Journal Name:
- Physical Review B
- Additional Journal Information:
- Journal Volume: 81; Journal Issue: 6; Journal ID: ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CONFIGURATION; MAGNETIC FIELDS; SPECTRA; SPECTROSCOPY; THICKNESS; TUNNELING
Citation Formats
Du, G. X., Wang, Shouguo, Ma, Q. L., Wang, Y., Ward, R. C. C., Zhang, Xiaoguang, Kohn, A., and Han, Prof. X. F. Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions. United States: N. p., 2010.
Web. doi:10.1103/PhysRevB.81.064438.
Du, G. X., Wang, Shouguo, Ma, Q. L., Wang, Y., Ward, R. C. C., Zhang, Xiaoguang, Kohn, A., & Han, Prof. X. F. Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions. United States. https://doi.org/10.1103/PhysRevB.81.064438
Du, G. X., Wang, Shouguo, Ma, Q. L., Wang, Y., Ward, R. C. C., Zhang, Xiaoguang, Kohn, A., and Han, Prof. X. F. 2010.
"Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions". United States. https://doi.org/10.1103/PhysRevB.81.064438.
@article{osti_979268,
title = {Spin-dependent tunneling spectroscopy for interface characterization of epitaxial Fe/MgO/Fe magnetic tunnel junctions},
author = {Du, G. X. and Wang, Shouguo and Ma, Q. L. and Wang, Y. and Ward, R. C. C. and Zhang, Xiaoguang and Kohn, A. and Han, Prof. X. F.},
abstractNote = {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 $V$. The peaks are independent of barrier thickness, magnetic field, and temperature. From the first-principles calculation, we identify the positive and negative bias spectra corresponding to different types of Fe/MgO interfaces. Tunneling spectroscopy thus can be used as a powerful tool for interface characterization.},
doi = {10.1103/PhysRevB.81.064438},
url = {https://www.osti.gov/biblio/979268},
journal = {Physical Review B},
issn = {0031-9007},
number = 6,
volume = 81,
place = {United States},
year = {Fri Jan 01 00:00:00 EST 2010},
month = {Fri Jan 01 00:00:00 EST 2010}
}
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