Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions

S. Nishioka; Y. V. Hamada; R. Matsumoto; M. Mizuguchi; M. Shiraishi; A. Fukushima; H. Kubota; T. Nagahama; S. Yuasa; H. Maehara; Y. Nagamine; K. Tsunekawa; D. D. Djayaprawira; N. Watanabe; Y. Suzuki

doi:10.1016/j.jmmm.2006.10.773

Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions

S. Nishioka, Y. V. Hamada, R. Matsumoto, M. Mizuguchi, M. Shiraishi, A. Fukushima, H. Kubota, T. Nagahama, S. Yuasa, H. Maehara, Y. Nagamine, K. Tsunekawa, D. D. Djayaprawira, N. Watanabe, Y. Suzuki

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

We measured differential conductance spectra of magnetic tunnel junctions (MTJs) with thin MgO barrier and low-resistance area product. The spectra of MTJs with MgO barrier thicker than 1.05 nm were essentially the same except for slight decrease of contributions from low-energy excitations, such as magnons. The spectra of MTJ with 1.01 nm MgO barrier were thoroughly different from the MTJs with thicker barrier. The result reveals that an MTJ with very thin MgO barrier thickness has different conduction characteristics from those with thicker MgO barriers.

Original language	English
Pages (from-to)	e649-e651
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 3
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.773
Publication status	Published - 2007 Mar
Externally published	Yes

Keywords

Electric band structure
Electronic transport
Magnetic film and multilayer
Tunneling

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Nishioka, S., Hamada, Y. V., Matsumoto, R., Mizuguchi, M., Shiraishi, M., Fukushima, A., Kubota, H., Nagahama, T., Yuasa, S., Maehara, H., Nagamine, Y., Tsunekawa, K., Djayaprawira, D. D., Watanabe, N., & Suzuki, Y. (2007). Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions. Journal of Magnetism and Magnetic Materials, 310(2 SUPPL. PART 3), e649-e651. https://doi.org/10.1016/j.jmmm.2006.10.773

Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions. / Nishioka, S.; Hamada, Y. V.; Matsumoto, R.; Mizuguchi, M.; Shiraishi, M.; Fukushima, A.; Kubota, H.; Nagahama, T.; Yuasa, S.; Maehara, H.; Nagamine, Y.; Tsunekawa, K.; Djayaprawira, D. D.; Watanabe, N.; Suzuki, Y.

In: Journal of Magnetism and Magnetic Materials, Vol. 310, No. 2 SUPPL. PART 3, 03.2007, p. e649-e651.

Research output: Contribution to journal › Article › peer-review

Nishioka, S, Hamada, YV, Matsumoto, R, Mizuguchi, M, Shiraishi, M, Fukushima, A, Kubota, H, Nagahama, T, Yuasa, S, Maehara, H, Nagamine, Y, Tsunekawa, K, Djayaprawira, DD, Watanabe, N & Suzuki, Y 2007, 'Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions', Journal of Magnetism and Magnetic Materials, vol. 310, no. 2 SUPPL. PART 3, pp. e649-e651. https://doi.org/10.1016/j.jmmm.2006.10.773

Nishioka, S. ; Hamada, Y. V. ; Matsumoto, R. ; Mizuguchi, M. ; Shiraishi, M. ; Fukushima, A. ; Kubota, H. ; Nagahama, T. ; Yuasa, S. ; Maehara, H. ; Nagamine, Y. ; Tsunekawa, K. ; Djayaprawira, D. D. ; Watanabe, N. ; Suzuki, Y. / Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions. In: Journal of Magnetism and Magnetic Materials. 2007 ; Vol. 310, No. 2 SUPPL. PART 3. pp. e649-e651.

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title = "Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions",

abstract = "We measured differential conductance spectra of magnetic tunnel junctions (MTJs) with thin MgO barrier and low-resistance area product. The spectra of MTJs with MgO barrier thicker than 1.05 nm were essentially the same except for slight decrease of contributions from low-energy excitations, such as magnons. The spectra of MTJ with 1.01 nm MgO barrier were thoroughly different from the MTJs with thicker barrier. The result reveals that an MTJ with very thin MgO barrier thickness has different conduction characteristics from those with thicker MgO barriers.",

keywords = "Electric band structure, Electronic transport, Magnetic film and multilayer, Tunneling",

author = "S. Nishioka and Hamada, {Y. V.} and R. Matsumoto and M. Mizuguchi and M. Shiraishi and A. Fukushima and H. Kubota and T. Nagahama and S. Yuasa and H. Maehara and Y. Nagamine and K. Tsunekawa and Djayaprawira, {D. D.} and N. Watanabe and Y. Suzuki",

note = "Funding Information: This work was supported by the 21st Century COE program (G18) of the Japan Society for the Promotion of Science. We acknowledge Ms. M. Yamamoto of AIST for micro-fabrication of the samples. This study was partly supported by Research and Development of Nanodevices for Practical Utilization of Nanotechnology (Nanotech Challenge Project) of New Energy and Industrial Technology Development Organization (NEDO). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.10.773",

language = "English",

volume = "310",

pages = "e649--e651",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "2 SUPPL. PART 3",

}

TY - JOUR

T1 - Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions

AU - Nishioka, S.

AU - Hamada, Y. V.

AU - Matsumoto, R.

AU - Mizuguchi, M.

AU - Shiraishi, M.

AU - Fukushima, A.

AU - Kubota, H.

AU - Nagahama, T.

AU - Yuasa, S.

AU - Maehara, H.

AU - Nagamine, Y.

AU - Tsunekawa, K.

AU - Djayaprawira, D. D.

AU - Watanabe, N.

AU - Suzuki, Y.

N1 - Funding Information: This work was supported by the 21st Century COE program (G18) of the Japan Society for the Promotion of Science. We acknowledge Ms. M. Yamamoto of AIST for micro-fabrication of the samples. This study was partly supported by Research and Development of Nanodevices for Practical Utilization of Nanotechnology (Nanotech Challenge Project) of New Energy and Industrial Technology Development Organization (NEDO). Copyright: Copyright 2008 Elsevier B.V., All rights reserved.

PY - 2007/3

Y1 - 2007/3

N2 - We measured differential conductance spectra of magnetic tunnel junctions (MTJs) with thin MgO barrier and low-resistance area product. The spectra of MTJs with MgO barrier thicker than 1.05 nm were essentially the same except for slight decrease of contributions from low-energy excitations, such as magnons. The spectra of MTJ with 1.01 nm MgO barrier were thoroughly different from the MTJs with thicker barrier. The result reveals that an MTJ with very thin MgO barrier thickness has different conduction characteristics from those with thicker MgO barriers.

AB - We measured differential conductance spectra of magnetic tunnel junctions (MTJs) with thin MgO barrier and low-resistance area product. The spectra of MTJs with MgO barrier thicker than 1.05 nm were essentially the same except for slight decrease of contributions from low-energy excitations, such as magnons. The spectra of MTJ with 1.01 nm MgO barrier were thoroughly different from the MTJs with thicker barrier. The result reveals that an MTJ with very thin MgO barrier thickness has different conduction characteristics from those with thicker MgO barriers.

KW - Electric band structure

KW - Electronic transport

KW - Magnetic film and multilayer

KW - Tunneling

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VL - 310

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JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

SN - 0304-8853

IS - 2 SUPPL. PART 3

ER -

Differential conductance measurements of low-resistance CoFeB/MgO/CoFeB magnetic tunnel junctions

Abstract

Keywords

ASJC Scopus subject areas

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