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Jun Uzuhashi
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Robust Preparation of Sub‐20‐nm‐Thin Lamellae for Aberration‐Corrected Electron Microscopy
Description/Abstract:
Aberration-corrected scanning transmission electron microscopy (STEM) has been advancing resolution, sensitivity, and microanalysis due t...
Keyword:
Automation
,
FIB
, and
TEM
Resource Type:
Article
Author:
Hideyo Tsurusawa
,
Jun Uzuhashi
,
Yusuke Kozuka
,
Koji Kimoto
, and
Tadakatsu Ohkubo
Journal:
Small Methods
Date Uploaded:
02/05/2024
Development of p-type Ion Implantation Technique for Realization of GaN Vertical MOSFETs
Description/Abstract:
GaN has attracted attention as a semiconductor material for next-generation power switching devices. Vertical-type GaN devices with MOS g...
Keyword:
atom probe tomography
,
gallium nitride
, and
transmission electron microscopy
Resource Type:
ProceedingsArticle
Author:
Ryo Tanaka
,
Shinya Takashima
,
Katsunori Ueno
,
Masahiro Horita
,
Jun Suda
,
Jun Uzuhashi
,
Tadakatsu Ohkubo
, and
Masaharu Edo
Date Uploaded:
19/04/2024
Heating rate dependence of coercivity and microstructure of Fe–B–P–Cu nanocrystalline soft magnetic materials
Description/Abstract:
The nanocrystalline structure and soft magnetic properties of melt-spun Fe-B-P-Cu ribbons are largely influenced by heating rates for cry...
Keyword:
atom probe tomography
Resource Type:
Article
Author:
Yohei Nomura
,
Jun Uzuhashi
,
Tatsuya Tomita
,
Toru Takahashi
,
Hidenori Kuwata
,
Taichi Abe
,
Tadakatsu Ohkubo
, and
Kazuhiro Hono
Journal:
Journal of Alloys and Compounds
Date Uploaded:
29/03/2024
Large voltage-controlled magnetic anisotropy effect in magnetic tunnel junctions prepared by deposition at cryogenic temperatures
Description/Abstract:
We investigated the influence of the buffer material and a cryogenic temperature deposition process on the voltage-controlled magnetic an...
Keyword:
Spintronics
Resource Type:
Article
Author:
Takayuki Nozaki
,
Tomohiro Ichinose
,
Jun Uzuhashi
,
Tatsuya Yamamoto
,
Makoto Konoto
,
Kay Yakushiji
,
Tadakatsu Ohkubo
, and
Shinji Yuasa
Journal:
APL Materials
Date Uploaded:
10/01/2024
Effect of Ca Addition on the Oxidation Resistance of Ni–Al Alloy
Description/Abstract:
Ni-base superalloys are known for their high temperature oxidation resistance, however, impurity of S at ppm order can significantly dec...
Keyword:
Ni-base superalloy
,
oxidation resistance
, and
sulfur segregation
Resource Type:
Article
Author:
Chihiro Tabata
,
Kyoko Kawagishi
,
Tadaharu Yokokawa
,
Jun Uzuhashi
,
Tadakatsu Ohkubo
,
Hiroshi Harada
, and
Shinsuke Suzuki
Journal:
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
Date Uploaded:
05/01/2024
Oxide layer dependent orbital torque efficiency in ferromagnet/Cu/oxide heterostructures
Description/Abstract:
The utilization of orbital transport provides a versatile and efficient spin manipulation mechanism. As interest in orbital-mediated spin...
Keyword:
spintronics
Resource Type:
Article
Author:
Junyeon Kim
,
Jun Uzuhashi
,
Masafumi Horio
,
Tomoaki Senoo
,
Dongwook Go
,
Daegeun Jo
,
Toshihide Sumi
,
Tetsuya Wada
,
Iwao Matsuda
,
Tadakatsu Ohkubo
,
Seiji Mitani
,
Hyun-Woo Lee
, and
YoshiChika Otani
Journal:
Physical Review Materials
Date Uploaded:
01/12/2023
Date Modified:
01/12/2023
Atomic Diffusion of Indium through Threading Dislocations in InGaN Quantum Wells
Description/Abstract:
The compositional and structural investigations of threading dislocations (TDs) in InGaN/GaN multiple quantum wells were carried out usin...
Keyword:
InGaN
,
atom probe tomography
,
dislocation
,
pipe diffusion
, and
transmission electron microscopy
Resource Type:
Article
Author:
Yudai Yamaguchi
,
Yuya Kanitani
,
Yoshihiro Kudo
,
Jun Uzuhashi
,
Tadakatsu Ohkubo
,
Kazuhiro Hono
, and
Shigetaka Tomiya
Journal:
NANO LETTERS
Date Uploaded:
04/10/2023
Date Modified:
04/10/2023
Annealing properties of vacancy-type defects in ion implanted GaN during ultra-high-pressure annealing studied by using a monoenergetic positron beam
Description/Abstract:
Behaviors of vacancy-type defects in ion-implanted GaN were studied by means of positron annihilation. Si or Mg ions were implanted into ...
Keyword:
gallium nitride
,
positron
, and
vacancy
Resource Type:
Article
Author:
Akira Uedono
,
Hideki Sakurai
,
Jun Uzuhashi
,
Tetsuo Narita
,
Kacper Sierakowski
,
Shoji Ishibashi
,
Shigefusa F. Chichibu
,
Michal Bockowski
,
Jun Suda
,
Tadakatsu Ohokubo
,
Nobuyuki Ikarashi
,
Kazuhiro Hono
, and
Tetsu Kachi
Journal:
Proceedings of SPIE - The International Society for Optical Engineering
Date Uploaded:
04/10/2023
Date Modified:
04/10/2023
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
Atomic resolution analysis of extended defects and Mg agglomeration in Mg-ion-implanted GaN and their impacts on acceptor formation
Description/Abstract:
We used atomic-scale direct observations by transmission electron microscopy (TEM) and atom probe tomography to clarify the crystallograp...
Keyword:
atom probe tomography
,
gallium nitride
, and
transmission electron microscopy
Resource Type:
Article
Author:
Emi Kano
,
Keita Kataoka
,
Jun Uzuhashi
,
Kenta Chokawa
,
Hideki Sakurai
,
Akira Uedono
,
Tetsuo Narita
,
Kacper Sierakowski
,
Michal Bockowski
,
Ritsuo Otsuki
,
Koki Kobayashi
,
Yuta Itoh
,
Masahiro Nagao
,
Tadakatsu Ohkubo
,
Kazuhiro Hono
,
Jun Suda
,
Tetsu Kachi
, and
Nobuyuki Ikarashi
Journal:
JOURNAL OF APPLIED PHYSICS
Date Uploaded:
28/09/2023
Date Modified:
28/09/2023
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Jun Uzuhashi
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