Abstract
The d2 Vd I2 -V measurements were used to investigate the tunneling mechanism in CoFeBMgOCoFeB magnetic tunnel junctions (MTJs), which showed a giant tunnel magnetoresistance ratio up to 200% at room temperature. The d2 Vd I2 -V spectra of CoFeBMgOCoFeB junctions resemble those of single-crystal Fe (001) MgO (001) Fe (001) MTJs. Broad peaks appeared around ±600 mV in spectra for antiparallel magnetic configurations. A complex structure was apparent in the spectra for parallel configurations. We inferred that giant tunnel magnetoresistance observed in CoFeBMgOCoFeB junctions originates in coherent tunneling between the Δ1 bands of crystallized CoFeB electrodes.
Original language | English |
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Article number | 08A905 |
Journal | Journal of Applied Physics |
Volume | 99 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2006 May 25 |
ASJC Scopus subject areas
- Physics and Astronomy(all)