The influences of various types of high-energy heavy-ion radiation on 10-nm-scale CoFeB-MgO magnetic tunnel junctions with a perpendicular easy axis have been investigated. In addition to possible latent damage, which has already been pointed out ...
JAPANESE JOURNAL OF APPLIED PHYSICS 56(8) 2017年8月 [査読有り]
This work represents the first-ever investigation of the effects of fast neutron exposure on the perpendicular-anisotropy CoFeB-MgO magnetic tunnel junctions (p-MTJs) with practical junction diameters (D) between 46 and 64 nm. In this study, 461 p...
Hiroaki Itsuji   Daisuke Kobayashi   Nelson E. Lourenco   Kazuyuki Hirose   
JAPANESE JOURNAL OF APPLIED PHYSICS 56(4) 2017年4月 [査読有り]
Studied is the soft error issue, which is a circuit malfunction caused by ion-radiation-induced noise currents. We have developed a laser-based soft-error simulation system to emulate the noise and evaluate its reproducibility in the time domain. ...
JOURNAL OF APPLIED PHYSICS 121(8) 085501 2017年2月 [査読有り]
The effects of soft X-ray exposure on structures of CH3NH3PbI3 perovskite were investigated using an X-ray photoelectron spectroscopy (XPS) time-dependent measurement method. A crystalline sample was fabricated with the inverse-temperature crystal...
2017 IEEE INTERNATIONAL RELIABILITY PHYSICS SYMPOSIUM (IRPS) 2017年 [査読有り]
Silicon-on-insulator (SOI) SRAMs supported by a thin buried-oxide (BOX) film have been exposed to wide-range high-energy heavy ions for simulating terrestrial and galactic radiation impacts. Experimental results have demonstrated that a back-bias ...
Kazuyuki Hirose   Daisuke Kobayashi   Taichi Ito   Tetsuo Endoh   
JAPANESE JOURNAL OF APPLIED PHYSICS 56(8) 2017年8月
The memory reliability of magnetic tunnel junctions has been examined from the aspect of their potential use in disaster-resilient computing. This computing technology requires memories that can keep stored information intact even in power-cut eme...
This paper presents analysis results for the onorbit performance of a solar array paddle of the X-ray astronomy satellite Suzaku. The current generated by the solar array was decreasing significantly for approximate one year after mid-2011. We est...
Y. Yanagawa, K. Hirose, H. Saito, D. Kobayashi, S. Fukuda, S. Ishii, D. Takahashi, K. Yamamoto, and Y. Kuroda, IEEE Transactions on Nuclear Science, 53 (6) pp. 3575-3578 (2006)
論文タイトル
Direct measurement of SET pulse widths in 0.2-μm SOI logic cells irradiated by heavy ions
T. Makino, D. Kobayashi, K. Hirose, Y. Yanagawa, H. Saito, D. Takahashi, S. Ishii, M. Kusano, S. Onoda, T. Hirao, and T. Ohshima, IEEE Transactions on Nuclear Science, 56 (1) pp. 202-207 (2009)
論文タイトル
LET dependence of single event transient pulse-widths in SOI logic cell