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  • Liu, R. S., et al. (author)
  • CoFe alloy as middle layer for strong spin dependent quantum well resonant tunneling in MgO double barrier magnetic tunnel junctions
  • 2013
  • In: Physical Review B. Condensed Matter and Materials Physics. - 1098-0121 .- 1550-235X. ; 87:2, s. 024411-
  • Journal article (peer-reviewed)abstract
    • We report on spin dependent quantum well (QW) resonances in the CoFe alloy middle layer of CoFe/MgO/CoFe/MgO/CoFeB double barrier magnetic tunnel junctions. The dI/dV spectra reveal clear resonant peaks for the parallel magnetization configurations, which can be related to the existence of QW resonances obtained from first-principles calculations. We observe that the differential tunneling magnetoresistance (TMR) exhibits an oscillatory behavior as a function of voltage with a sign change as well as a pronounced TMR enhancement at resonant voltages at room temperature. The observation of strong QW resonances indicates that the CoFe film possesses a long majority spin mean-free path, and the substitutional disorder does not cause a significant increase of scattering. Both points are confirmed by first-principles electronic structure calculation. DOI: 10.1103/PhysRevB.87.024411
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  • Result 1-1 of 1
Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Canali, Carlo M. (1)
Liu, R. S. (1)
Parkin, Stuart S. P. (1)
Jiang, Xin (1)
Gao, Li (1)
Yang, See-Hun (1)
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Zhang, X. G. (1)
Rettner, Charles (1)
Topuria, Teya (1)
Rice, Philip M. (1)
Zhang, Weifeng (1)
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University
Linnaeus University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2013 (1)

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