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Tadakatsu Ohkubo
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Keyword
scanning transmission electron microscopy
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Large Tunneling Magnetoresistance in Perpendicularly Magnetized Magnetic Tunnel Junctions Using Co75Mn25/Mo/Co20Fe60B20 Multilayers
Description/Abstract:
We study the magnetic and electrical transport properties of magnetic tunnel junctions (MTJs) consisting of a Co3Mn/Mo/CoFeB multilayer p...
Keyword:
energy dispersive X-ray spectrometry
,
magnetic tunnel junctions
,
nanobeam electron diffraction
, and
scanning transmission electron microscopy
Resource Type:
Article
Author:
Tatsuya Yamamoto
,
Tomohiro Ichinose
,
Jun Uzuhashi
,
Takayuki Nozaki
,
Tadakatsu Ohkubo
,
Kay Yakushiji
,
Shingo Tamaru
, and
Shinji Yuasa
Journal:
Physical Review Applied
Date Uploaded:
03/10/2023
Date Modified:
05/10/2023
Acceptor activation of Mg-doped GaN—Effects of N2/O2 vs N2 as ambient gas during annealing
Description/Abstract:
Here, we investigate the effects of O2:N2 (1:1) as ambient gas as compared with pure N2 during activation annealing of Mg as p-type dopin...
Keyword:
activation
,
gallium nitride
,
scanning transmission electron microscopy
, and
semiconductor
Resource Type:
Article
Author:
Ashutosh Kumar
,
Martin Berg
,
Qin Wang
,
Jun Uzuhashi
,
Tadakatsu Ohkubo
,
Michael Salter
, and
Peter Ramvall
Journal:
JOURNAL OF APPLIED PHYSICS
Date Uploaded:
28/09/2023
Date Modified:
28/09/2023
Atomic-scale investigation of implanted Mg in GaN through ultra-high-pressure annealing
Description/Abstract:
An area selective doping via ion implantation is a key technology to realize gallium nitride (GaN) based energy-efficient power devices; ...
Keyword:
atom probe tomography
,
cathodoluminescence
,
gallium nitride
,
implantation
, and
scanning transmission electron microscopy
Resource Type:
Article
Author:
Jun Uzuhashi
,
Jun Chen
,
Ashutosh Kumar
,
Wei Yi
,
Tadakatsu Ohkubo
,
Ryo Tanaka
,
Shinya Takashima
,
Masaharu Edo
,
Kacper Sierakowski
,
Michal Bockowski
,
Hideki Sakurai
,
Tetsu Kachi
,
Takashi Sekiguchi
, and
Kazuhiro Hono
Journal:
JOURNAL OF APPLIED PHYSICS
Date Uploaded:
04/07/2023
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Keyword
scanning transmission electron microscopy
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gallium nitride
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English
3
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AIP Publishing
2
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Creative Commons BY Attribution 4.0 International
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Jun Uzuhashi
3
Tadakatsu Ohkubo
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Ashutosh Kumar
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JOURNAL OF APPLIED PHYSICS
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Physical Review Applied
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