Tunneling spectroscopy in CoFeBMgOCoFeB magnetic tunnel junctions

Kazunaga Ono, Tadaomi Daibou, Sung Jin Ahn, Yuya Sakuraba, Takefumi Miyakoshi, Tadashi Morita, Yukio Kikuchi, Mikihiko Oogane, Yasuo Ando, Terunobu Miyazaki

研究成果: Article査読

16 被引用数 (Scopus)

抄録

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.

本文言語English
論文番号08A905
ジャーナルJournal of Applied Physics
99
8
DOI
出版ステータスPublished - 2006

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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