Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer

S. Ishikawa; H. Sato; M. Yamanouchi; S. Ikeda; S. Fukami; F. Matsukura; H. Ohno

doi:10.1063/1.4798499

Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer

S. Ishikawa, H. Sato, M. Yamanouchi, S. Ikeda, S. Fukami, F. Matsukura, H. Ohno

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

17 Citations (Scopus)

Abstract

Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer were investigated and the structure was adopted as a recording layer in magnetic tunnel junctions (MTJs) with perpendicular magnetic easy-axis to attain a high thermal stability. Perpendicular easy-axis was obtained with the Pt thickness range of 0.6-1.2 nm and the CoFeB thickness range of 0.6-1.5 nm. As-made MTJs employing the CoFeB-[Co/Pt] multilayer structure as a recording layer showed tunnel magnetoresistance of 40 on average. A high thermal stability factor over 200 was obtained in the MTJs with the size of 25 nm in diameter.

Original language	English
Article number	17C721
Journal	Journal of Applied Physics
Volume	113
Issue number	17
DOIs	https://doi.org/10.1063/1.4798499
Publication status	Published - 2013 May 7

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer",

abstract = "Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer were investigated and the structure was adopted as a recording layer in magnetic tunnel junctions (MTJs) with perpendicular magnetic easy-axis to attain a high thermal stability. Perpendicular easy-axis was obtained with the Pt thickness range of 0.6-1.2 nm and the CoFeB thickness range of 0.6-1.5 nm. As-made MTJs employing the CoFeB-[Co/Pt] multilayer structure as a recording layer showed tunnel magnetoresistance of 40 on average. A high thermal stability factor over 200 was obtained in the MTJs with the size of 25 nm in diameter.",

author = "S. Ishikawa and H. Sato and M. Yamanouchi and S. Ikeda and S. Fukami and F. Matsukura and H. Ohno",

note = "Funding Information: This work was supported by the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST program) of Japan Society for Promotion of Science (JSPS) and Research and Development for Next-Generation Information Technology of MEXT. The authors wish to thank I. Morita, T. Hirata, H. Iwanuma, C. Igarashi, and Y. Kawato for technical support in film deposition and MTJ fabrication.",

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doi = "10.1063/1.4798499",

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T1 - Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer

AU - Ishikawa, S.

AU - Sato, H.

AU - Yamanouchi, M.

AU - Ikeda, S.

AU - Fukami, S.

AU - Matsukura, F.

AU - Ohno, H.

N1 - Funding Information: This work was supported by the Funding Program for World-Leading Innovative R&D on Science and Technology (FIRST program) of Japan Society for Promotion of Science (JSPS) and Research and Development for Next-Generation Information Technology of MEXT. The authors wish to thank I. Morita, T. Hirata, H. Iwanuma, C. Igarashi, and Y. Kawato for technical support in film deposition and MTJ fabrication.

PY - 2013/5/7

Y1 - 2013/5/7

N2 - Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer were investigated and the structure was adopted as a recording layer in magnetic tunnel junctions (MTJs) with perpendicular magnetic easy-axis to attain a high thermal stability. Perpendicular easy-axis was obtained with the Pt thickness range of 0.6-1.2 nm and the CoFeB thickness range of 0.6-1.5 nm. As-made MTJs employing the CoFeB-[Co/Pt] multilayer structure as a recording layer showed tunnel magnetoresistance of 40 on average. A high thermal stability factor over 200 was obtained in the MTJs with the size of 25 nm in diameter.

AB - Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer were investigated and the structure was adopted as a recording layer in magnetic tunnel junctions (MTJs) with perpendicular magnetic easy-axis to attain a high thermal stability. Perpendicular easy-axis was obtained with the Pt thickness range of 0.6-1.2 nm and the CoFeB thickness range of 0.6-1.5 nm. As-made MTJs employing the CoFeB-[Co/Pt] multilayer structure as a recording layer showed tunnel magnetoresistance of 40 on average. A high thermal stability factor over 200 was obtained in the MTJs with the size of 25 nm in diameter.

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Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer

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