Sub-Poissonian shot noise in CoFeB/MgO/CoFeB-based magnetic tunneling junctions

Tomonori Arakawa, Koji Sekiguchi, Shuji Nakamura, Kensaku Chida, Yoshitaka Nishihara, Daichi Chiba, Kensuke Kobayashi, Akio Fukushima, Shinji Yuasa, Teruo Ono

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)


We measured the shot noise in the CoFeB/MgO/CoFeB-based magnetic tunneling junctions with a high tunneling magnetoresistance ratio (over 200% at 3 K). Although the Fano factor in the antiparallel configuration is close to unity, it is observed to be typically 0.91±0.01 in the parallel configuration. It indicates the sub-Poissonian process of the electron tunneling in the parallel configuration due to the relevance of the spin-dependent coherent transport in the low bias regime.

Original languageEnglish
Article number202103
JournalApplied Physics Letters
Issue number20
Publication statusPublished - 2011 May 16
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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