Giant tunnel magnetoresistance in codeposited fullerene-cobalt films in the low bias-voltage regime

Seiji Sakai, Isamu Sugai, Seiji Mitani, Koki Takanashi, Yoshihiro Matsumoto, Hiroshi Naramoto, Pavel V. Avramov, Satoru Okayasu, Yoshihito Maeda

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Abstract

Magnetotransport properties in the low bias-voltage regime were investigated for codeposited C60 -Co films. A giant tunnel magnetoresistance (MR) ratio (ΔR Rmax) of 80%, which is the highest in ferromagnetic metal/organic molecule systems, was found at low temperatures. The observed bias-voltage dependence of the MR ratio is expressed by an unusual exponential form, suggesting that the MR ratio of nearly 100% can be realized in the low bias-voltage limit.

Original languageEnglish
Article number242104
JournalApplied Physics Letters
Volume91
Issue number24
DOIs
Publication statusPublished - 2007 Dec 20

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Sakai, S., Sugai, I., Mitani, S., Takanashi, K., Matsumoto, Y., Naramoto, H., Avramov, P. V., Okayasu, S., & Maeda, Y. (2007). Giant tunnel magnetoresistance in codeposited fullerene-cobalt films in the low bias-voltage regime. Applied Physics Letters, 91(24), [242104]. https://doi.org/10.1063/1.2822397