TITLE

Magnetic tunnel junctions with a zinc oxide–cobalt oxide composite tunnel barrier

AUTHOR(S)
Le Brizoual, L.; Alnot, P.; Hehn, M.; Montaigne, F.; Alnot, M.; Schuhl, A.; Snoeck, E.
PUB. DATE
March 2005
SOURCE
Applied Physics Letters;3/14/2005, Vol. 86 Issue 11, p112505
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Composite CoO–ZnO tunnel junctions showing nonlinear and asymmetric current-voltage characteristics with significant magnetoresistance ratios (up to 8% at 77 K) have been prepared by using reactive sputtering from a zinc target. Electron transmission microscopy demonstrates the formation of a zinc oxide–cobalt oxide bilayer. Observed asymmetries, which are directly linked to the difference in zinc oxide and cobalt oxide barrier heights are in good agreement with calculations done within the framework of a parabolic bands model, using thicknesses extracted from transmission electron microscopy (TEM) images and barrier heights found in literature.
ACCESSION #
16581634

 

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