Effects of annealing on local composition and electrical transport correlations in MgO-based magnetic tunnel junctions

A. N. Chiaramonti, D. K. Schreiber, W. F. Egelhoff, David N. Seidman, A. K. Petford-Long

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

The effects of annealing on the electrical transport behavior of CoFe/MgO/CoFe magnetic tunnel junctions have been studied using a combination of site-specific in situ transmission electron microscopy and three-dimensional atom-probe tomography. Annealing leads to an increase in the resistance of the junctions. A shift in the conductance curve (dI/dV) minimum from 0 V for the as-grown specimen correlates with a sharply defined layer of CoFe oxide at the lower ferromagnetic interface. Annealing decreases the asymmetry in the conductance by making the interfaces more diffuse and the tunnel barrier more chemically homogeneous.

Original languageEnglish (US)
Article number103113
JournalApplied Physics Letters
Volume93
Issue number10
DOIs
StatePublished - 2008

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Effects of annealing on local composition and electrical transport correlations in MgO-based magnetic tunnel junctions'. Together they form a unique fingerprint.

Cite this