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

doi:10.1063/1.3590921

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 journal › Article › peer-review

22 Citations (Scopus)

Abstract

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 language	English
Article number	202103
Journal	Applied Physics Letters
Volume	98
Issue number	20
DOIs	https://doi.org/10.1063/1.3590921
Publication status	Published - 2011 May 16
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

Access to Document

10.1063/1.3590921

Cite this

@article{c5ed58c7c304423e986e4138daf992a1,

title = "Sub-Poissonian shot noise in CoFeB/MgO/CoFeB-based magnetic tunneling junctions",

abstract = "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.",

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

note = "Funding Information: We appreciate fruitful comments and supports from Markus B{\"u}ttiker, Wulf Wulfhekel, Eva Hirtenlechner, and Takeo Kato. This work is partially supported by JSPS Funding Program for Next Generation World-Leading Researchers. ",

year = "2011",

month = may,

day = "16",

doi = "10.1063/1.3590921",

language = "English",

volume = "98",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "20",

}

TY - JOUR

T1 - Sub-Poissonian shot noise in CoFeB/MgO/CoFeB-based magnetic tunneling junctions

AU - Arakawa, Tomonori

AU - Sekiguchi, Koji

AU - Nakamura, Shuji

AU - Chida, Kensaku

AU - Nishihara, Yoshitaka

AU - Chiba, Daichi

AU - Kobayashi, Kensuke

AU - Fukushima, Akio

AU - Yuasa, Shinji

AU - Ono, Teruo

N1 - Funding Information: We appreciate fruitful comments and supports from Markus Büttiker, Wulf Wulfhekel, Eva Hirtenlechner, and Takeo Kato. This work is partially supported by JSPS Funding Program for Next Generation World-Leading Researchers.

PY - 2011/5/16

Y1 - 2011/5/16

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=79957535832&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79957535832&partnerID=8YFLogxK

U2 - 10.1063/1.3590921

DO - 10.1063/1.3590921

M3 - Article

AN - SCOPUS:79957535832

VL - 98

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 20

M1 - 202103

ER -

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

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this