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Tadakatsu Ohkubo
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An Automated Site-Specific Tip Preparation Method for Atom Probe Tomography Using Script-Controlled Focused Ion Beam/Scanning Electron Microscopy
Description/Abstract:
The automatization of the atom probe tomography (APT) tip preparation using a focused ion beam (FIB) with a scanning electron microscopy ...
Keyword:
atom probe tomography
,
focused ion beam
, and
scanning electron microscopy
Resource Type:
Article
Author:
Jun Uzuhashi
,
Tadakatsu Ohkubo
, and
Kazuhiro Hono
Journal:
Microscopy and Microanalysis
Date Uploaded:
04/09/2024
Micromagnetic simulations of Nd-Fe-B hot-deformed magnets subjected to eutectic grain boundary diffusion process
Description/Abstract:
The grain boundary diffusion process (GBDP) is one of the most efficient treatments for increasing the coercivity (Hc) of Nd-Fe-B magnets...
Keyword:
Grain boundary diffusion process
,
Micromagnetic simulation
,
Nd-Fe-B
, and
Permanent magnet
Resource Type:
Article
Author:
Anton Bolyachkin
,
Ekaterina Dengina
,
Hossein Sepehri-Amin
,
Tadakatsu Ohkubo
, and
Kazuhiro Hono
Journal:
Scripta Materialia
Date Uploaded:
23/08/2024
Effect of sequential N ion implantation in the formation of a shallow Mg-implanted p-type GaN layer
Description/Abstract:
An area selectable Mg doping via ion implantation (I/I) is essential to realize gallium nitride (GaN) based power switching devices. Conv...
Keyword:
atom probe tomography
,
cathodoluminescence
,
gallium nitride
, and
transmission electron microscopy
Resource Type:
Article
Author:
Jun Uzuhashi
,
Jun Chen
,
Ryo Tanaka
,
Shinya Takashima
,
Masaharu Edo
,
Tadakatsu Ohkubo
, and
Takashi Sekiguchi
Journal:
JOURNAL OF APPLIED PHYSICS
Date Uploaded:
02/08/2024
Charge-to-spin conversion in fully epitaxial Ru/Cu hybrid nanolayers with interface control
Description/Abstract:
We report on fully epitaxial Ru/Cu heterostructures fabricated with interface engineering and nanolayer insertions consisting of Cu (1nm)...
Keyword:
charge-to-spin conversion
,
epitaxial Ru/Cu heterostructures
, and
interface control
Resource Type:
Article
Author:
Jieyuan Song
,
Cong He
,
Thomas Scheike
,
Zhenchao Wen
,
Hiroaki Sukegawa
,
Tadakatsu Ohkubo
,
Yukio Nozaki
, and
Seiji Mitani
Journal:
NANOTECHNOLOGY
Date Uploaded:
18/06/2024
Enhanced orbital torque efficiency in nonequilibrium Ru50Mo50(0001) alloy epitaxial thin films
Description/Abstract:
Epitaxial thin films of fully nonequilibrium hcp-Ru_50Mo_50(0001) nanoalloys were prepared as a chemically disordered alloy, in which the...
Keyword:
Epitaxial thin films
,
Nonequilibrium
,
Orbital torque
, and
Ru50Mo50(0001)
Resource Type:
Article
Author:
Ke Tang
,
Cong He
,
Zhenchao Wen
,
Hiroaki Sukegawa
,
Tadakatsu Ohkubo
,
Yukio Nozaki
, and
Seiji Mitani
Journal:
APL Materials
Date Uploaded:
13/05/2024
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
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16
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Keyword
atom probe tomography
7
gallium nitride
5
transmission electron microscopy
4
scanning transmission electron microscopy
3
cathodoluminescence
2
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Language
English
17
Publisher
AIP Publishing
5
American Physical Society (APS)
2
Elsevier BV
2
American Chemical Society (ACS)
1
American Institute of Physics
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17
Rights Statement Sim
Creative Commons BY Attribution 4.0 International
6
In Copyright
6
Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
4
Creative Commons BY-NC-SA Attribution-NonCommercial-ShareAlike 4.0 International
1
Data origin
experiments
1
Characterization methods
tomography -- atom probe tomography
1
Material/Specimen
Zr–Cu–Al alloy
1
Material type
bulk metallic glasses
1
Author
Tadakatsu Ohkubo
16
Jun Uzuhashi
13
Kazuhiro Hono
6
Masaharu Edo
3
Ryo Tanaka
3
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Japan Society for the Promotion of Science
2
Government of Japan Ministry of Education Culture Sports Science and Technology
1
Japan Science and Technology Agency
1
Ministry of Education, Culture, Sports, Science and Technology
1
Journal
JOURNAL OF APPLIED PHYSICS
4
APL Materials
2
Scripta Materialia
2
Journal of Alloys and Compounds
1
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
1
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