Influence of heavy ion irradiation on perpendicular-anisotropy CoFeB-MgO magnetic tunnel junctions

Daisuke Kobayashi, Yuya Kakehashi, Kazuyuki Hirose, Shinobu Onoda, Takahiro Makino, Takeshi Ohshima, Shoji Ikeda, Michihiko Yamanouchi, Hideo Sato, Eli Christopher Enobio, Tetsuo Endoh, Hideo Ohno

研究成果: Conference contribution

5 被引用数 (Scopus)

抄録

A non-volatile memory element that is called a perpendicular-anisotropy magnetic tunnel junction has been fabricated in a CoFeB/MgO/CoFeB film stack technology. It exhibits two stable resistance values, high or low, depending on the relative direction of magnetization of the two ferromagnetic CoFeB layers. After programmed into the high resistance state with a current injection scheme based on the spin transfer torque theory, the tunnel junction has been exposed to 15-MeV Si ions in different voltage stress conditions. It has been observed that the tested structure remains in the programmed high resistance state after received the bombardments of several tens of Si ions and more, even under the stressed situations. A time-domain analysis has proven that this result is due to the perfect immunity of the tested magnetic tunnel junction to single event upsets. A resistance degradation due to the heavy-ion irradiation has been detected through a precise parameter analysis based on a tunneling theory but negligibly small, 1%.

本文言語English
ホスト出版物のタイトルProceedings of the European Conference on Radiation and its Effects on Components and Systems, RADECS
出版社Institute of Electrical and Electronics Engineers Inc.
ISBN(電子版)9781467350570
DOI
出版ステータスPublished - 2013 10 28
イベント2013 14th European Conference on Radiation and Its Effects on Components and Systems, RADECS 2013 - Oxford, United Kingdom
継続期間: 2013 9 232013 9 27

出版物シリーズ

名前Proceedings of the European Conference on Radiation and its Effects on Components and Systems, RADECS

Other

Other2013 14th European Conference on Radiation and Its Effects on Components and Systems, RADECS 2013
国/地域United Kingdom
CityOxford
Period13/9/2313/9/27

ASJC Scopus subject areas

  • 放射線
  • 電子工学および電気工学

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