研究者詳細 - 齋藤　晃

論文 - 齋藤　晃

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Surface sensitivity of atomic-resolution secondary electron imaging

Saitoh, K; Oyobe, T; Igarashi, K; Sato, T; Matsumoto, H; Inada, H; Endo, T; Miyata, Y; Usami, R; Takenobu, T

MICROSCOPY 2024年9月

Near-field electron ptychography using full-field structured illumination

Tamaki, H; Saitoh, K

MICROSCOPY 2024年7月

Development of silicon-on-insulator direct electron detector with analog memories in pixels for sub-microsecond imaging

Ishida, T; Sugie, K; Miyoshi, T; Ishida, Y; Saitoh, K; Arai, Y; Kuwahara, M

MICROSCOPY 2024年6月

Giant impurity effect on anomalous Hall effect of Mn3Sn

Yano, R; Kihara, S; Yoneda, M; Vu, HTN; Suto, H; Katayama, N; Yamaguchi, T; Kuwahara, M; Suzuki, MT; Saitoh, K; Kashiwaya, S

JOURNAL OF CHEMICAL PHYSICS 160 巻 ( 18 ) 2024年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Chemical Physics

Mn3Sn is an anomalous Hall effect (AHE) antiferromagnet that exhibits the hysteretic AHE in antiferromagnetic (AFM) phase at room temperature. We report that whisker Mn3Sn crystals grown by the flux method exhibit a non-hysteretic AHE at mid-to-low temperatures when the whisker Mn3Sn is surrounded by a thin layer of ferromagnetic Mn2−xSn. These crystals exhibit a hysteretic AHE above 275 K due to the spin alignment of the inverse triangular lattice, which is similar to other crystals. However, upon cooling the crystal, it exhibits a non-hysteretic AHE with a spiral AFM spin structure at 100-200 K. We concluded that the non-hysteretic AHE is induced at the interface of Mn2−xSn/Mn3Sn. We believe that the scalar-spin chirality in the spiral AFM phase of Mn3Sn, modulated by Mn2−xSn through the magnetic proximity effect, produces the AHE. This discovery opens a new avenue for tailoring the AHE by magnetic layers.

DOI： 10.1063/5.0195211

Web of Science

Scopus

PubMed

Phase retrieval of electron rocking curves using total variation and total squared variation regularizations

Shichi, A; Ishizuka, H; Saitoh, K

MICROSCOPY 73 巻 ( 3 ) 頁： 262 - 274 2023年11月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Microscopy

In this study, a new method for the phase retrieval of electron rocking curves observed using convergent-beam electron diffraction, which is applicable to the determination of three-dimensional lattice displacement fields along the beam direction, is proposed. Total variation and total squared variation regularizations are introduced for phase retrieval to suppress overfitting to noise or background signals in the rocking curves and to reproduce the sparse characteristics of displacement fields, which exist only near lattice defects. The results show that the proposed algorithm is effective for rocking curves modulated by the dynamical effect of electron diffraction. The accuracy of phase reconstruction using the proposed method is also discussed. Phase retrieval of the experimental rocking curves obtained from a stacking fault in stainless steel is demonstrated.

DOI： 10.1093/jmicro/dfad048

Web of Science

Scopus

PubMed

Superconductivity in High-Entropy Antimonide M1-x Pt x Sb (M = Equimolar Ru, Rh, Pd, and Ir)

Hirai Daigorou, Uematsu Naoto, Saitoh Koh, Katayama Naoyuki, Takenaka Koshi

INORGANIC CHEMISTRY 62 巻 ( 35 ) 頁： 14207 - 14215 2023年8月

Measurement and correction of TEM image distortion using arbitrary samples

Tamaki Hirokazu, Saitoh Koh

MICROSCOPY 2023年2月

Carbonization of a Molybdenum Substrate Surface and Nanoparticles by a One-Step Method of Femtosecond Laser Ablation in a Hexane Solution 査読有り

Y. Tanaka, X. Yu, S. Terakawa, T. Ishida, K. Saitoh, H. Zhang, T. Asaka, F. Itoigawa, M. Kuwahara, S. Ono

ACS Omega 8 巻 ( 8 ) 頁： 7932 - 7939 2023年

Static Hydrophobic Cuprous Oxide Surface Fabricated via One-Step Laser-Induced Oxidation of a Copper Substrate 査読有り

X. Yu, Y. Tanaka, T. Kakiuchi, T. Ishida, K. Saitoh, F. Itoigawa, M. Kuwahara, S. Ono

Micromachines 14 巻 ( 1 ) 頁： 185 2023年

Orbital angular momentum-resolved convergent-beam electron diffraction by the post-selected injection of electron beam

Saitoh Koh, Yonezawa Tatsuya, Nambu Hiroki, Tanimura Shogo, Uchida Masaya

MICROSCOPY 71 巻 ( 6 ) 頁： 374 - 379 2022年12月

Extension of focal depth by electron quasi-Bessel beam in atomic-resolution scanning transmission electron microscopy

Ishida Takafumi, Owaki Takeshi, Ohtsuka Masahiro, Kuwahara Makoto, Saitoh Koh, Kawasaki Tadahiro

APPLIED PHYSICS EXPRESS 15 巻 ( 11 ) 2022年11月

Transient electron energy-loss spectroscopy of optically stimulated gold nanoparticles using picosecond pulsed electron beam

Kuwahara Makoto, Mizuno Lira, Yokoi Rina, Morishita Hideo, Ishida Takafumi, Saitoh Koh, Tanaka Nobuo, Kuwahara Shota, Agemura Toshihide

APPLIED PHYSICS LETTERS 121 巻 ( 14 ) 2022年10月

Surface cleavage of zinc oxide induced by femtosecond laser irradiation

Yu X., Takeda Y., Hamasaki S., Ishida T., Kuwahara M., Saitoh K., Itoigawa F., Ono S.

2022 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2022 - Proceedings 2022年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：2022 Conference on Lasers and Electro-Optics Pacific Rim, CLEO-PR 2022 - Proceedings

Cleavage along the crystalline and cleavage-melt shift were observed on the surface of a ZnO substrate when it was irradiated by single and multiple femtosecond laser pulses, respectively.

DOI： 10.1109/CLEO-PR62338.2022.10432217

Scopus

Surface cleavage of zinc oxide induced by femtosecond laser irradiation

Yu X., Takeda Y., Hamasaki S., Ishida T., Kuwahara M., Saitoh K., Itoigawa F., Ono S.

Optics InfoBase Conference Papers 2022年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Optics InfoBase Conference Papers

Cleavage along the crystalline and cleavage-melt shift were observed on the surface of a ZnO substrate when it was irradiated by single and multiple femtosecond laser pulses, respectively.

DOI： 10.1364/CLEOPR.2022.P_CTh5_03

Scopus

透過電子顕微鏡による圧縮センシング

野村優貴, 穴田智史, 山本和生, 平山司, 齋藤晃

顕微鏡 56 巻 ( 3 ) 頁： 116 - 123 2021年12月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人日本顕微鏡学会

不十分な数の観測データから原信号を推定する圧縮センシング技術における根幹は，原信号に含まれるパターンや法則を見つけ出すことであり，その目的において機械学習は非常に有効な手段である．本解説では，走査透過電子顕微鏡法・電子エネルギー損失分光法・電子線ホログラフィーに対して，それぞれに含まれるパターンや法則を，それぞれの信号特性に適する統計的信号処理（スパースコーディング／テンソル分解）によって抽出し，原信号を高精度に推定する技術を紹介する．

DOI： 10.11410/kenbikyo.56.3_116

CiNii Research

Observation of domain wall bimerons in chiral magnets

Nagase Tomoki, So Yeong-Gi, Yasui Hayata, Ishida Takafumi, Yoshida Hiroyuki K., Tanaka Yukio, Saitoh Koh, Ikarashi Nobuyuki, Kawaguchi Yuki, Kuwahara Makoto, Nagao Masahiro

NATURE COMMUNICATIONS 12 巻 ( 1 ) 2021年6月

Denoising of series electron holograms using tensor decomposition

Nomura Yuki, Yamamoto Kazuo, Anada Satoshi, Hirayama Tsukasa, Igaki Emiko, Saitoh Koh

MICROSCOPY 70 巻 ( 3 ) 頁： 255 - 264 2021年6月

Performance of a silicon-on-insulator direct electron detector in a low-voltage transmission electron microscope

Ishida Takafumi, Shinozaki Akira, Kuwahara Makoto, Miyoshi Toshinobu, Saitoh Koh, Arai Yasuo

MICROSCOPY 70 巻 ( 3 ) 頁： 321 - 325 2021年6月

Intensity Interference in a Coherent Spin-Polarized Electron Beam

Kuwahara Makoto, Yoshida Yuya, Nagata Wataru, Nakakura Kojiro, Furui Masato, Ishida Takafumi, Saitoh Koh, Ujihara Toru, Tanaka Nobuo

PHYSICAL REVIEW LETTERS 126 巻 ( 12 ) 2021年3月

Slow dynamics of disordered zigzag chain molecules in layered LiVS2 under electron irradiation

Katayama Naoyuki, Kojima Keita, Yamaguchi Tomoki, Hattori Sosuke, Tamura Shinya, Ohara Koji, Kobayashi Shintaro, Sugimoto Koudai, Ohta Yukinori, Saitoh Koh, Sawa Hiroshi

NPJ QUANTUM MATERIALS 6 巻 ( 1 ) 2021年2月

HAADF-STEM observation of unique quasicrystalline precipitates from solid solution in Mg-Cd-Yb system

Ohhashi Satoshi, Saitoh Koh, Kato Akira, Tsai An-Pang

MATERIALS CHARACTERIZATION 172 巻 2021年2月

Denoising of series electron holograms using tensor decomposition 招待有り査読有り

Yuki Nomura, Kazuo Yamamoto, Satoshi Anada, Tsukasa Hirayama, Emiko Igaki, Koh Saitoh

Microscopy 2020年9月

Development of a voltage-applicable heating specimen holder for in situ observations of solid oxide fuel cells with an environmental transmission electron microscope

Ishida Takafumi, Hiroshima Hideto, Higuchi Kimitaka, Tomita Masahiro, Saitoh Koh, Tanji Takayoshi

SURFACE AND INTERFACE ANALYSIS 52 巻 ( 9 ) 頁： 584 - 590 2020年9月

多変量解析を用いた全固体Liイオン電池のOperando STEM-EELS 査読有り

野村優貴, 山本和生, 平山司, 井垣恵美子, 齋藤晃

顕微鏡 55 巻 ( 2 ) 頁： 70 - 74 2020年8月

記述言語：日本語掲載種別：研究論文（学術雑誌）出版者・発行元：公益社団法人日本顕微鏡学会

全固体リチウムイオン電池（全固体LIB）は，現行LIBの課題を克服する可能性を有する次世代二次電池である．しかしながら，電極／固体電解質界面でのLiイオン移動抵抗がその性能を制限する．そのため，界面現象をナノメートルスケールで解明し，材料設計にフィードバックすることが重要である．本稿では，走査透過型電子顕微鏡法（STEM）と電子エネルギー損失分光法（EELS）を用いて，全固体LIB内のLi分布と遷移金属元素の電子状態を動的に観察するOperando観察手法を紹介する．LiCoO2正極と酸化物系固体電解質の界面近傍をSTEM-EELS観察し，多変量解析を適用することにより，充放電中のLi分布の変化を定量的に計測した．その結果，Liイオンが不均一に脱離／挿入され，また，電気化学反応の活性が成膜直後のLi濃度に依存することが明らかになった．また，界面近傍の約10–20 nmの領域では，電気化学的に不活性なCo3O4が存在していることがわかり，本全固体LIBの界面抵抗の原因を特定できた．

DOI： 10.11410/kenbikyo.55.2_70

CiNii Research

Visualization of Lithium Transfer Resistance in Secondary Particle Cathodes of Bulk-Type Solid-State Batteries

Nomura Yuki, Yamamoto Kazuo, Hirayama Tsukasa, Igaki Emiko, Saitoh Koh

ACS ENERGY LETTERS 5 巻 ( 6 ) 頁： 2098 - 2105 2020年6月

Dynamic imaging of lithium in solid-state batteries by operando electron energy-loss spectroscopy with sparse coding

Nomura Yuki, Yamamoto Kazuo, Fujii Mikiya, Hirayama Tsukasa, Igaki Emiko, Saitoh Koh

NATURE COMMUNICATIONS 11 巻 ( 1 ) 2020年6月

高分解能HAADF-STEM像の辞書学習によるペロブスカイト酸化物の原子変位検出

服部颯介, 野村優貴, 齋藤晃

日本物理学会講演概要集 75.1 巻 ( 0 ) 頁： 2279 - 2279 2020年

Efficient Measurement of the Orbital-Angular-Momentum Spectrum of an Electron Beam via a Dammann Vortex Grating

Noguchi Yuuki, Nakayama Shota, Ishida Takafumi, Saitoh Koh, Uchida Masaya

PHYSICAL REVIEW APPLIED 12 巻 ( 6 ) 2019年12月

Smectic Liquid-Crystalline Structure of Skyrmions in Chiral Magnet Co8.5Zn7.5Mn4(110) Thin Film

Nagase T., Komatsu M., So Y. G., Ishida T., Yoshida H., Kawaguchi Y., Tanaka Y., Saitoh K., Ikarashi N., Kuwahara M., Nagao M.

PHYSICAL REVIEW LETTERS 123 巻 ( 13 ) 2019年9月

Creating electron phase holograms using femtosecond laser interference processing

Uesugi Yuuki, Fukushima Ryota, Saitoh Koh, Sato Shunichi

OPTICS EXPRESS 27 巻 ( 15 ) 頁： 20958 - 20964 2019年7月

Laser Interference Processing of Electron Phase Holograms by Using a Femtosecond Laser

Uesugi Yuuki, Fukushima Ryota, Sato Shunichi, Saitoh Koh

Conference on Lasers and Electro-Optics:Science and Innovations 2019 頁： SF1E.5. 2019年5月

Laser Interference Processing of Electron Phase Holograms by Using a Femtosecond Laser

Uesugi Y., Fukushima R., Sato S., Saitoh K.

2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings 2019年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：2019 Conference on Lasers and Electro-Optics, CLEO 2019 - Proceedings

Electron phase hologram was fabricated by a single-shot femtosecond laser interference processing. The generation of electron vortices from the fabricated hologram was demonstrated with higher diffraction efficiency than that of amplitude hologram as expected.

DOI： 10.23919/CLEO.2019.8750423

Scopus

Direct Observation of a Li-Ionic Space-Charge Layer Formed at an Electrode/Solid-Electrolyte Interface

Nomura Yuki, Yamamoto Kazuo, Hirayama Tsukasa, Ouchi Satoru, Igaki Emiko, Saitoh Koh

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION 58 巻 ( 16 ) 頁： 5292 - 5296 2019年4月

Quantitative Operando Visualization of Electrochemical Reactions and Li Ions in All-Solid-State Batteries by STEM-EELS with Hyperspectral Image Analyses

Nomura Yuki, Yamamoto Kazuo, Hirayama Tsukasa, Ohkawa Mayumi, Igaki Emiko, Hojo Nobuhiko, Saitoh Koh

NANO LETTERS 18 巻 ( 9 ) 頁： 5892-5898 2018年9月

Electric shielding films for biased TEM samples and their application to in situ electron holography

Nomura Yuki, Yamamoto Kazuo, Hirayama Tsukasa, Saitoh Koh

MICROSCOPY 67 巻 ( 3 ) 頁： 178-186 2018年6月

Coherent pulse beam in spin-polarized TEM using an NEA photocathode

Kuwahara M., Ujihara T., Saitoh K., Tanaka N.

2018 31ST INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC) 頁： . 2018年

STEM-EELSを用いた金八面体ナノ粒子の局在表面プラズモンの観測

水野りら, 桑原真人, 石田高史, 齋藤晃

日本物理学会講演概要集 73.1 巻 ( 0 ) 頁： 2499 - 2499 2018年

Nearly nondiffracting electron lattice beams generated by polygonal slits

Nambu Hiroki, Noguchi Yuuki, Saitoh Koh, Uchida Masaya

MICROSCOPY 66 巻 ( 4 ) 頁： 295 - 299 2017年8月

特集にあたって

齋藤晃

顕微鏡 52 巻 ( 1 ) 頁： 3 2017年4月

Determination of a 3D Displacement Field at a Vicinity of a GeSn/Ge Interface by the Phse Retrieval of Electron Rocking Curves 査読有り

M. Miura, S. Fujinami, K. Saitoh, N. Tanaka, O. Nakatsuka, S. Zaima

AMTC Letters 5 巻頁： 46-47 2016年

The Boersch effect in a picosecond pulsed electron beam emitted from a semiconductor photocathode 査読有り

M. Kuwahara, Y. Nambo, K. Aoki, K. Sameshima, X. Jin, T. Ujihara, H. Asano, K. Saitoh, Y. Takeda, and N. Tanaka

Applied Physics Letters 109 巻頁： 013108 2016年

Strain evolution of epitaxial tetragonal-like BiFeO3 thin films on LaAlO3(001) substrates prepared by sputtering and their bulk photovoltaic effect 査読有り

S. Nakashima, T. Uchida, K. Doi, K. Saitoh, H. Fujisawa, O. Sakata, Y. Katsuya, N. Tanaka, and M. Shimizu

Japanese Journal of Applied Physics 55 巻頁： 101501 2016年

Electron Diffractive imaging using Fork-Shaped Grating Masks 査読有り

H. Nambu, K. Saitoh, M. Uchida

AMTC Letters 5 巻頁： 248-249 2016年

In situ Observation of Interfaces between Metal Electrode and Solid Oxide Electrolyte Prepared by FIB 査読有り

T. Ishida, T. Tanji, M. Tomita, K, Higuchi, K. Saitoh

AMTC Letters 5 巻頁： 62-63 2016年

Measuring the Orbital Angular Momentum of Electron Vortex Beams Using a Forked Grating 査読有り

K. Saitoh, Y. Hasegawa, K. Hirakawa, N. Tanaka, and M. Uchida

Physical Review Letters 111 巻頁： 074801 2013年8月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

The present study experimentally examines how an electron vortex beam with orbital angular momentum (OAM) undergoes diffraction through a forked grating. The nth-order diffracted electron vortex beam after passing through a forked grating with a Burgers vector of 1 shows an OAM transfer of n@. Hence, the diffraction patterns become mirror asymmetric owing to the size difference between the electron beams. Such a forked grating, when used in combination with a pinhole located at the diffraction plane, could act as an analyzer to measure the OAM of input electrons.

DOI： 10.1103/PhysRevLett.111.074801

Propagation Dynamics of Electron Vortex Pairs 査読有り

Y. Hasegawa, K. Saitoh, N. Tanaka, and M. Uchida

Journal of the Physical Society of Japan 82 巻頁： 073402 2013年6月

記述言語：英語掲載種別：研究論文（学術雑誌）

Electron vortex beams carrying orbital angular momentum have been experimentally realized very recently. Here, we present the generation and propagation dynamics of electron vortex pairs embedded in a single beam, using a nanofabricated holographic grating. The rotation of two electron vortices with the same topological charges and the annihilation of two electron vortices with opposite charges were observed. The experimental results are well explained by the Gouy phase shift and confirmed by numerical simulations of the propagation. The results of this study may help develop an intuitive understanding of electron vortex motion and give a new viewpoint for analyzing electron microscope images and phase change in a crystal.

DOI： 10.7566/JPSJ.82.073402

らせん状の波面をもつ電子波の生成、伝播、干渉招待有り査読有り

齋藤晃、長谷川裕也、内田正哉

顕微鏡 48 巻 ( 1 ) 頁： 39-46 2013年4月

Young's Interference Experiment with Electron Beams Carrying Orbital Angular Momentum 査読有り

Y. Hasegawa, K. Saitoh, N. Tanaka, S. Tanimura and M. Uchida

Journal of the Physical Society of Japan 82 巻頁： 033002 2013年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

A Young's-type double-slit experiment using electron beams carrying orbital angular momentum (OAM) is demonstrated in a transmission electron microscope. Each of the slits is replaced by a grating mask with a fork dislocation, which generates electron beams with OAM as diðracted beams. Interference fringes produced by two diðracted electron beams with OAM appear at the observation screen. The interference fringe patterns exhibit dislocation features depending on the topological charges of the two electron beams. The experimental results clearly show the wave nature of the electron beams with OAM and gives potential applications in electron physics and quantum mechanics.

DOI： 10.7566/JPSJ.82.033002

HOLZ線図形をもちいたSiGe/Si界面近傍の格子湾曲および伸張歪みの解析招待有り査読有り

齋藤晃

まてりあ 51 巻 ( 8 ) 頁： 371-378 2012年

30-kV spin-polarized transmission electron microscope with GaAs-GaAsP strained superlattice photocathode 査読有り

M. Kuwahara, S. Kusunoki, X. G. Jin, T. Nakanishi, Y. Takeda, K. Saitoh, T. Ujihara, H. Asano, and N. Tanaka

101 巻 ( 3 ) 頁： 033102 2012年

Electron interference from an amorphous thin film on a crystal transmission electron microscopy specimen 査読有り

Rodney A. Herring, Koh Saitoh, Takayoshi Tanji, and Nobuo Tanaka

Journal of Electron Microscopy 61 巻頁： 17-23 2012年

Production of electron vortex beams carrying large orbital angular momentum using spiral zone plates 査読有り

Koh Saitoh, Yuya Hasegawa, Nobuo Tanaka, and Masaya Uchida

Journal of Electron Microscopy 61 巻 ( 3 ) 頁： 171-177 2012年

Analysis of thickness modulation in GaAs/GaAsP strained superlattice by TEM observation 招待有り査読有り

Xiuguang Jin, Hirotaka Nakahara, Koh Saitoh, Takashi Saka, Toru Ujihara, Nobuo Tanaka, Yoshikazu Takeda

Journal of Crystal Growth 353 巻頁： 84-87 2012年

内殻励起をともなう非弾性散乱をもちいた電子構造異方性解析招待有り査読有り

齋藤晃

顕微鏡 47 巻 ( 4 ) 頁： 228-237 2012年

Observation of the hole state symmetry of MgB2 by inelastic scattering of fast electrons accompanied by boron K-shell excitation 査読有り

K. Saitoh, K. Momonoi, N. Tanaka, and S. Onari

Journal of Applied Physics 112 巻頁： 113920 2012年

Three-dimensional reconstruction of the atomic arrangement of icosahedral quasicrystals by binary discrete tomography 査読有り

Y. Ishibashi, H. Sugiura, K. Saitoh, and N. Tanaka

Philosophical Magazine Letters 91 巻 ( 9 ) 頁： 632-639 2011年

Automated characterization of bending and expansion of a lattice of a Si substrate near a SiGe/Si interface by using split HOLZ line patterns 査読有り

K. Saitoh, Y. Yasuda, M. Hamabe and N. Tanaka

J. Electron Microsc. 59 巻頁： 367-378 2010年10月

Coherent electron interference from amorphous TEM specimens 査読有り

R. A. Herring, K. Saitoh, N. Tanaka and T. Tanji

J. Electron Microsc. 59 巻頁： 321-330 2010年10月

Atom-column distinction by Kikuchi pattern observed by an aberration-corrected convergent electron probe 査読有り

K. Saitoh, Y. Tatara and N. Tanaka

J. Electron Microsc. 59 巻頁： 387-394 2010年10月

Factors Affecting Extreme Ultraviolet Reflectivity of Mo/Si Multilayer FilmsSynthesized by Superconducting Magnetron Sputtering 査読有り

Uichiro Mizutani, Takashi Yamaguchi, Tetsuya Tomofuji, Yousuke Yanagi,Yoshitaka Itoh, Koh Saitoh, Nobuo Tanaka, Noriaki Matsunami, and Hiroshi Ikuta

Japanese Journal of Applied Physics 48 巻頁： 025507-1-6 2009年2月

Observation of the three-dimensional q-dependence of inelastic scattering cross-section of the K-shell excitation of graphite 査読有り

K. Saitoh, K. Nagasaka and N. Tanaka

International Journal of Advanced Microscopy and Theoretical Calculations 1 巻頁： 92 2008年6月

Structure refinement of a decagonal Al72Ni20Co8 quasicrystal by using convergent-beam electron diffraction

Hiroki Murakami, Koh Saitoh, Nobuo Tanaka and An Pang Tsai

International Journal of Advanced Microscopy and Theoretical Calculations 1 巻頁： 88-89 2008年6月

Automated lattice-parameter determination by using HOLZ line patterns

Koh Saitoh, Yoshifumi Yasuda and Nobuo Tanaka

International Journal of Advanced Microscopy and Theoretical Calculations 1 巻頁： 90-91 2008年6月

Structure refinement of a decagonal quasicrystal of Al72Ni20Co8by convergent-beam electron diffraction 査読有り

Koh Saitoh, Hiroki Murakami and Nobuo Tanaka

Zeitschrift fuer Kristallographie 223 巻頁： 859-862 2008年

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（学術雑誌）

Structure refinement of a water quenched alloy of Al72Ni20Co8, which is known as a highly ordered decagonal quasicrystal, has been carried out by quantitative comparison of experimental and simulated intensities of convergent-beam electron diffraction (CBED) patterns. In the present study, higher-order Laue zone reflections, whose intensities are sensitively changed with atom positions, have been used for the refinement of atom position parameters in the quasiperiodic directions. The refined parameters have been compared with the results obtained by X-ray diffraction.

収束電子回折法によって明らかにしたCd系正20面体準結晶の特異な対称性招待有り

齋藤晃、横澤忠洋

日本結晶学会誌 49 巻頁： 34-39 2007年

ALCHEMI study of chemical order in Al-Cu-Co decagonal quasicrystals 査読有り

K. Saitoh and A. P. Tsai

Philosophical Magazine 87 巻 ( 18-21 ) 頁： 2741 - 2746 2007年

Structural disorder of the atom cluster in a highly-ordered decagonal quasicrystal of Al72Ni20Co8 査読有り

K. Saitoh, N. Tanaka, A. P. Tsai and K. Ishizuka

Philosophical Magazine 87 巻 ( 18-21 ) 頁： 2733 - 2739 2007年

Observation of the anisotropy of the inelastic scattering of fast electrons accompanied by the K-shell ionization of a carbon nanotube 査読有り

K. Saitoh, K. Nagasaka and N. Tanaka

Journal of Electron Microscopy 55 巻 ( 6 ) 頁： 281 - 288 2006年

Direct observation of oxygen atoms in rutile titanium dioxide by spherical aberration corrected high-resolution transmission electron microscopy 査読有り

K. Yoshida, T. Kawai, T. Nambara, S. Tanemura, K. Saitoh and N. Tanaka

Nanotechnology 17 巻頁： 3944−3950 2006年

Direct observation of six-membered rings in the upper and lower walls of a single-wall carbon nanotube by spherical aberration-corrected HRTEM 査読有り

K. Hirahara, K. Saitoh, J. Yamasaki and N. Tanaka

NANO LETTERS 6 巻頁： 1778 2006年

HAADF-STEM法による高分解能Z コントラスト像観察招待有り

齋藤晃

日本結晶学会誌 47 巻頁： 9-14 2005年

Formation of a superlattice order from a fundamental-lattice decagonal quasicrystal of Al72Ni20Co8 査読有り

K. Saitoh, T. Yokosawa, M. Tanaka, A. P. Tsai

Journal of the Physical Society of Japan 73 巻 ( 7 ) 頁： 1786-1792 2004年

ALCHEMI study of an S1-type superlattice-ordered decagonal quasicrystal of Al70 Ni18 Co12 査読有り

K. Saitoh, M. Tanaka and A. P. Tsai

J. Non-Cryst. Solids 334&335 巻頁： 202-206 2004年

In-situ HREM observation of the structural change from a fundamental-lattice decagonal quasicrystal of Al72Ni20Co8 to the S1 type superlattice phase 査読有り

K. Saitoh, T. Yokosawa, M. Tanaka, A. P. Tsai

Ferroelectrics 305 巻頁： 253−256 2004年

High-temperature phase transition in lanthanum titanate perovskite La-0.64(Ti-0.92,Nb-0.08)O-3 査読有り

M. Yashima M, Mori M, Kamiyama T, Oikawa K, Hoshikawa A, Torii S, Saitoh K and Tsuda K

Chemical Physics Letters 375 巻頁： 240-246 2003年

Structural study of an Al-Co approximant by high-angle annular dark-field scanning transmission electron microscopy 査読有り

T. Yokosawa, K. Saitoh, M. Tanaka, A. P. Tsai

J. Phys. Soc. Jpn. 71 巻頁： 2601 2002年

Stacking sequences of atom-clusters in decagonal quasicrystals and their approximants 査読有り

Koh Saitoh and Michiyoshi Tanaka

J. Alloys and Comps. 342 巻頁： 130 - 133 2002年

Control of crystal polarity in a wurtzite crystal: ZnO films grown by plasma-assisted molecular-beam epitaxy on GaN 査読有り

S.-K. Hong, T. Hanada, H.-J. Ko, Y. Chen, T. Yao, D. Imai, K. Araki, M. Shinohara, K. Saitoh, M. Terauchi

Phys. Rev. B 65 巻頁： 115331 2002年

Distinction between the Space Groups having Rotation and Screw Axes, Which are Combined with 2 Fold Rotation Axes, using the Coherent Convergent-beam Electron Diffraction Method 査読有り

K. Saitoh, K. Tsuda, M. Terauchi, M. Tanaka

Acta Crystallographica A 57 巻頁： 219 - 230 2001年

Space-group determination of cubic and its superlattice-ordered rhombohedral phases of Zn63Mg23Er14 using the convergent-beam electron diffraction method 査読有り

Koh Saitoh, Aris Kounis, Gerhert Miehe, Hartmut Fuess, Roland Sterzel and W. Assmus

Z. Kristallogr. 216 巻頁： 1 - 4 2001年

ALCHEMI study of an Al72Ni20Co8 decagonal quasicrystal 査読有り

Koh Saitoh, Michiyoshi Tanaka, An Pang Tsai and Chris J. Rossouw

J. Phys. Soc. Jpn. 69 巻頁： 2379 - 2382 2000年

A new structural model of an Al72Ni20Co8 decagonal quasicrystal 査読有り

Koh Saitoh, Kenji Tsuda and Michiyoshi Tanaka

Journal of the Physical Society of Japan 67 巻頁： 2578 - 2580 1998年

Experimental verification of the quasi-unit-cell model of quasicrystal structure 査読有り

P. J. Steinhardt, H. C. Jeong, K. Saitoh, M. Tanaka, E. Abe, A. P. Tsai

Nature 396 巻頁： 55 1998年

Structural Study of Al72Ni20Co8 Decagonal Quasicrystal by High-Angle Annular Dark-Field method 査読有り

Koh Saitoh, Kenji Tsuda, Michiyoshi Tanaka, Kenji kaneko and An Pang Tsai

Japanese Journal of Applied Physics 36 巻頁： L1400 - L1402 1997年

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