publication_type publication_year number author title journal_title volume_number issue_number start_page end_page doi reported_at Paper 2023 1 新津 甲大 超弾性とその弾性熱量効果 熱測定 50 2 70 75 2024-04-20 13:47:01 +0900 Paper 2023 2 Yuta Kimura, Xiao Xu, Kwangsik Han, Kodai Niitsu, Toshihiro Omori, Rie Y. Umetsu, Ryosuke Kainuma MATERIALS TRANSACTIONS 64 7 1591 1599 https://doi.org/10.2320/matertrans.mt-m2023003 2024-04-20 13:47:01 +0900 Paper 2023 3 K. Niitsu, Y. Yano, R. Kainuma, H. Inui Physical Review B 108 13 https://doi.org/10.1103/physrevb.108.134103 2024-04-20 13:47:01 +0900 Paper 2023 4 Fumihiko Ichihara, Kodai Niitsu, Yoshinori Tanaka, Yasuhiro Niwa, Kazutaka Mitsuishi, Shogo Miyoshi, Takahisa Ohno, Takuya Masuda The Journal of Physical Chemistry C 127 31 15043 15050 https://doi.org/10.1021/acs.jpcc.3c02132 2024-04-20 13:47:01 +0900 Paper 2023 5 K. Nakazawa, S. Lee, K. Niitsu, M. Kameyama, T. Sannomiya, S. Kohara, K. Mitsuishi, K. Tsuchiya Journal of Non-Crystalline Solids 606 122197 https://doi.org/10.1016/j.jnoncrysol.2023.122197 2024-04-20 13:47:01 +0900 Paper 2022 1 Kodai Niitsu, Yizhou Liu, Alexander C. Booth, Xiuzhen Yu, Nitish Mathur, Matthew J. Stolt, Daisuke Shindo, Song Jin, Jiadong Zang, Naoto Nagaosa, Yoshinori Tokura Geometrically stabilized skyrmionic vortex in FeGe tetrahedral nanoparticles Nature Materials 21 3 305 310 https://doi.org/10.1038/s41563-021-01186-x 2024-04-20 13:47:01 +0900 Paper 2022 2 Zentaro Akase, Kenta Kimura, Tomohiro Saito, Kodai Niitsu, Toshiaki Tanigaki, Yoh Iwasaki, Parmanand Sharma, Akihiro Makino, Daisuke Shindo Magnetic flux in soft magnetic Fe-Si-B-P-Cu amorphous alloy containing nanocrystallites analyzed by electron holography Journal of Magnetism and Magnetic Materials 541 168519 https://doi.org/10.1016/j.jmmm.2021.168519 2024-04-20 13:47:01 +0900 Paper 2021 1 Tetsuya Hamada, Masaya Higashi, Kodai Niitsu, Haruyuki Inui Phase equilibria among η-Fe2Al5 and its higher-ordered phases Science and Technology of Advanced Materials 22 1 373 385 https://doi.org/10.1080/14686996.2021.1915691 2024-04-20 13:47:01 +0900 Paper 2021 2 N. Hanasaki, M. Oda, K. Niitsu, K. Ehara, H. Murakawa, H. Sakai, H. Nitani, H. Abe, H. Sagayama, H. Uetsuka, T. Karube, H. Inui Element dependence of local disorder in medium-entropy alloy CrCoNi AIP Advances 11 12 125216 https://doi.org/10.1063/5.0072766 2024-04-20 13:47:01 +0900 Paper 2021 3 Yuki Sugiura, Kodai Niitsu, Yasuko Saito, Takashi Endo, Masanori Horie Inorganic process for wet silica-doping of calcium phosphate RSC Advances 11 20 12330 12335 https://doi.org/10.1039/d1ra00288k 2024-04-20 13:47:01 +0900 Paper 2021 4 Dengshan Zhou, Zhenghao Chen, Kazuki Ehara, Kodai Nitsu, Katsushi Tanaka, Haruyuki Inui Effects of annealing on hardness, yield strength and dislocation structure in single crystals of the equiatomic Cr-Mn-Fe-Co-Ni high entropy alloy Scripta Materialia 191 173 178 https://doi.org/10.1016/j.scriptamat.2020.09.039 2024-04-20 13:47:01 +0900 Paper 2020 1 Kodai Niitsu, Makoto Asakura, Koretaka Yuge, Haruyuki Inui Prediction of Face-Centered Cubic Single-Phase Formation for Non-Equiatomic Cr–Mn–Fe–Co–Ni High-Entropy Alloys Using Valence Electron Concentration and Mean-Square Atomic Displacement MATERIALS TRANSACTIONS 61 9 1874 1880 https://doi.org/10.2320/matertrans.mt-m2020144 2024-04-20 13:47:01 +0900 Paper 2020 2 Yuki Sugiura, Hideki Obika, Masanori Horie, Kodai Niitsu, Yoji Makita Aesthetic Silver-Doped Octacalcium Phosphate Powders Exhibiting Both Contact Antibacterial Ability and Low Cytotoxicity ACS Omega 5 38 24434 24444 https://doi.org/10.1021/acsomega.0c02868 2024-04-20 13:47:01 +0900 Paper 2020 3 Kodai Niitsu Temperature dependence of magnetic exchange stiffness in iron and nickel Journal of Physics D: Applied Physics 53 39 39LT01 https://doi.org/10.1088/1361-6463/ab9672 2024-04-20 13:47:01 +0900 Paper 2020 4 K. Niitsu, H. Date, R. Kainuma Thermal activation of stress-induced martensitic transformation in Ni-rich Ti-Ni alloys Scripta Materialia 186 263 267 https://doi.org/10.1016/j.scriptamat.2020.05.010 2024-04-20 13:47:01 +0900 Paper 2020 5 Ken Harada, Marek Malac, Misa Hayashida, Koudai Niitsu, Keiko Shimada, Darren Homeniuk, Marco Beleggia Toward the quantitative the interpretation of hole-free phase plate images in a transmission electron microscope. Ultramicroscopy 209 112875 https://doi.org/10.1016/j.ultramic.2019.112875 2024-04-20 13:47:01 +0900 Paper 2020 6 Hao Wang, Hongwei Geng, Dengshan Zhou, Kodai Niitsu, Ondrej Muránsky, Deliang Zhang Multiple strengthening mechanisms in high strength ultrafine-grained Al–Mg alloys Materials Science and Engineering: A 771 138613 https://doi.org/10.1016/j.msea.2019.138613 2024-04-20 13:47:01 +0900 Paper 2020 7 K. Niitsu, X. Xu, R. Y. Umetsu, R. Kainuma, K. Harada "Temperature dependence of exchange stiffness in an off-stoichiometric Ni2MnIn Heusler alloy" Physical Review B 101 1 https://doi.org/10.1103/physrevb.101.014443 2024-04-20 13:47:01 +0900 Paper 2019 1 Youngji Cho, Kodai Niitsu, Yoshihiro Midoh, Koji Nakamae, Daisuke Shindo, Jun-Mo Yang, Yasukazu Murakami Suppressing Geometric Phase Shift Owing to Antiphase Boundaries in Dark-Field Electron Holography MATERIALS TRANSACTIONS 60 5 698 703 https://doi.org/10.2320/matertrans.mc201809 2024-04-20 13:47:01 +0900 Paper 2019 2 Nitish Mathur, Matthew J. Stolt, Kodai Niitsu, Xiuzhen Yu, Daisuke Shindo, Yoshinori Tokura, Song Jin Electron Holography and Magnetotransport Measurements Reveal Stabilized Magnetic Skyrmions in Fe1–xCoxSi Nanowires ACS Nano 13 7 7833 7841 https://doi.org/10.1021/acsnano.9b02130 2024-04-20 13:47:01 +0900 Paper 2019 3 Ken Harada, Kodai Niitsu, Keiko Shimada, Tetsuji Kodama, Tetsuya Akashi, Yoshimasa A Ono, Daisuke Shindo, Hiroyuki Shinada, Shigeo Mori Electron holography on Fraunhofer diffraction Microscopy 68 3 254 260 https://doi.org/10.1093/jmicro/dfz007 2024-04-20 13:47:01 +0900 Paper 2018 1 Ken Harada, Tetsuya Akashi, Kodai Niitsu, Keiko Shimada, Yoshimasa A. Ono, Daisuke Shindo, Hiroyuki Shinada, Shigeo Mori Interference experiment with asymmetric double slit by using 1.2-MV field emission transmission electron microscope Scientific Reports 8 1 https://doi.org/10.1038/s41598-018-19380-4 2024-04-20 13:47:01 +0900 Paper 2018 2 K. Niitsu, T. Tanigaki, K. Harada, D. Shindo Temperature dependence of 180° domain wall width in iron and nickel films analyzed using electron holography Applied Physics Letters 113 22 222407 https://doi.org/10.1063/1.5056308 2024-04-20 13:47:01 +0900 Paper 2018 3 K. Harada, K. Shimada, Y. A. Ono, Y. Iwasaki, K. Niitsu, D. Shindo Electron holography study on vortex beam phases in real space Microscopy and Microanalysis 24 S1 1470 1471 https://doi.org/10.1017/s1431927618007833 2024-04-20 13:47:01 +0900 Paper 2018 4 K. Niitsu, A. Sato, T.T. Sasaki, R. Sawada, Y. Cho, Y. Takada, T. Sato, Y. Kaneko, A. Kato, T. Ohkubo, D. Shindo, K. Hono, Y. Murakami Magnetization measurements for grain boundary phases in Ga-doped Nd-Fe-B sintered magnet Journal of Alloys and Compounds 752 220 230 https://doi.org/10.1016/j.jallcom.2018.04.055 2024-04-20 13:47:01 +0900 Paper 2018 5 Kiyou Shibata, Toshiaki Tanigaki, Tetsuya Akashi, Hiroyuki Shinada, Ken Harada, Kodai Niitsu, Daisuke Shindo, Naoya Kanazawa, Yoshinori Tokura, Taka-hisa Arima Current-Driven Motion of Domain Boundaries between Skyrmion Lattice and Helical Magnetic Structure Nano Letters 18 2 929 933 https://doi.org/10.1021/acs.nanolett.7b04312 2024-04-20 13:47:01 +0900 Paper 2018 6 Kodai Niitsu, Yuta Kimura, Toshihiro Omori, Ryosuke Kainuma Cryogenic superelasticity with large elastocaloric effect NPG Asia Materials 10 1 e457 e457 https://doi.org/10.1038/am.2017.213 2024-04-20 13:47:01 +0900 Paper 2017 1 Toshiaki Tanigaki, Tetsuya Akashi, Akira Sugawara, Katsuya Miura, Jun Hayakawa, Kodai Niitsu, Takeshi Sato, Xiuzhen Yu, Yasuhide Tomioka, Ken Harada, Daisuke Shindo, Yoshinori Tokura, Hiroyuki Shinada Magnetic field observations in CoFeB/Ta layers with 0.67-nm resolution by electron holography Scientific Reports 7 1 https://doi.org/10.1038/s41598-017-16519-7 2024-04-20 13:47:01 +0900 Paper 2017 2 Kodai Niitsu, Yuta Kimura, Ryosuke Kainuma Transformation entropy change and precursor phenomena in Ni-rich Ti–Ni shape memory alloys Journal of Materials Research 32 20 3822 3830 https://doi.org/10.1557/jmr.2017.377 2024-04-20 13:47:01 +0900 Paper 2017 3 R. Sawada, T. Yamamoto, K. Minakuchi, M. Nagasako, Y. Hayasaka, K. Niitsu, Y. Cho, R. Kainuma, Y. Murakami Cellular microstructures superposed on martensite plates in Mn 55.2 Ga 19.0 Cu 25.8 alloy showing large coercivity Scripta Materialia 135 33 36 https://doi.org/10.1016/j.scriptamat.2017.03.013 2024-04-20 13:47:01 +0900 Paper 2017 4 Hiroaki Suzuki, Zentaro Akase, Kodai Niitsu, Toshiaki Tanigaki, Daisuke Shindo Secondary electron effect on electron beam induced charging of SiO2particle analyzed by electron holography Microscopy https://doi.org/10.1093/jmicro/dfw112 2024-04-20 13:47:01 +0900 Paper 2017 5 K. Niitsu, K. Minakuchi, X. Xu, M. Nagasako, I. Ohnuma, T. Tanigaki, Y. Murakami, D. Shindo, R. Kainuma Atomic-resolution evaluation of microsegregation and degree of atomic order at antiphase boundaries in Ni 50 Mn 20 In 30 Heusler alloy Acta Materialia 122 166 177 https://doi.org/10.1016/j.actamat.2016.09.035 2024-04-20 13:47:01 +0900 Paper 2016 1 Yuta Kimura, Xiao Xu, Kodai Niitsu, Toshihiro Omori, Ryosuke Kainuma Martensitic Transformations and Superelastic Behavior at Low Temperatures in Ti<sub>50&minus;</sub><i><sub>x</sub></i>Ni<sub>40+</sub><i><sub>x</sub></i>Cu<sub>10</sub> Shape Memory Alloys MATERIALS TRANSACTIONS 57 3 269 277 https://doi.org/10.2320/matertrans.mb201504 2024-04-20 13:47:01 +0900 Paper 2016 2 Yasukazu Murakami, Kodai Niitsu, Syuhei Kaneko, Toshiaki Tanigaki, Taisuke Sasaki, Zentaro Akase, Daisuke Shindo, Tadakatsu Ohkubo, Kazuhiro Hono Strain measurement in ferromagnetic crystals using dark-field electron holography Applied Physics Letters 109 19 193102 https://doi.org/10.1063/1.4967005 2024-04-20 13:47:01 +0900 Paper 2016 3 Toshiaki Tanigaki, Ken Harada, Yasukazu Murakami, Kodai Niitsu, Tetsuya Akashi, Yoshio Takahashi, Akira Sugawara, Daisuke Shindo New trend in electron holography Journal of Physics D: Applied Physics 49 24 244001 https://doi.org/10.1088/0022-3727/49/24/244001 2024-04-20 13:47:01 +0900 Paper 2015 1 K. Niitsu, Y. Kimura, X. Xu, R. Kainuma Composition Dependences of Entropy Change and Transformation Temperatures in Ni-rich Ti–Ni System Shape Memory and Superelasticity 1 2 124 131 https://doi.org/10.1007/s40830-015-0023-2 2024-04-20 13:47:01 +0900 Paper 2014 1 Kodai Niitsu, Ryosuke Kainuma Effect of annealing on stress-induced transformation behaviors at low temperatures in a Ti-51.8 at.% Ni shape memory alloy physica status solidi (b) 251 10 2041 2047 https://doi.org/10.1002/pssb.201350418 2024-04-20 13:47:01 +0900 Paper 2014 2 Y. Murakami, K. Niitsu, T. Tanigaki, R. Kainuma, H. S. Park, D. Shindo Magnetization amplified by structural disorder within nanometre-scale interface region Nature Communications 5 1 https://doi.org/10.1038/ncomms5133 2024-04-20 13:47:01 +0900 Paper 2013 1 K. Niitsu, X. Xu, R. Y. Umetsu, R. Kainuma Stress-induced transformations at low temperatures in a Ni45Co5Mn36In14metamagnetic shape memory alloy Applied Physics Letters 103 24 242406 https://doi.org/10.1063/1.4840336 2024-04-20 13:47:01 +0900 Paper 2013 2 K. Niitsu, S. Fujieda, A. Fujita, R. Kainuma Microstructure and magnetic properties of as-quenched cubic and tetragonal La(Fe1−xSix)13 compounds Journal of Alloys and Compounds 578 220 227 https://doi.org/10.1016/j.jallcom.2013.05.059 2024-04-20 13:47:01 +0900 Paper 2013 3 K. Niitsu, T. Omori, R. Kainuma Stress-induced transformation behaviors at low temperatures in Ti-51.8Ni (at. %) shape memory alloy Applied Physics Letters 102 23 231915 https://doi.org/10.1063/1.4809935 2024-04-20 13:47:01 +0900 Paper 2013 4 Y. Murakami, K. Yanagisawa, K. Niitsu, H.S. Park, T. Matsuda, R. Kainuma, D. Shindo, A. Tonomura Determination of magnetic flux density at the nanometer-scale antiphase boundary in Heusler alloy Ni50Mn25Al12.5Ga12.5 Acta Materialia 61 6 2095 2101 https://doi.org/10.1016/j.actamat.2012.12.029 2024-04-20 13:47:01 +0900 Paper 2012 1 Kodai Niitsu, Ryosuke Kainuma Effect of Microalloying Elements on Solidification Microstructure of the La(Fe<sub>0</sub><sub>.</sub><sub>89</sub>Si<sub>0</sub><sub>.11</sub>)<sub>13</sub> Alloy Key Engineering Materials 508 172 177 https://doi.org/10.4028/www.scientific.net/kem.508.172 2024-04-20 13:47:01 +0900 Paper 2012 2 K. Niitsu, R. Kainuma Phase equilibria in the Fe–La–Si ternary system Intermetallics 20 1 160 169 https://doi.org/10.1016/j.intermet.2011.06.005 2024-04-20 13:47:01 +0900 Paper 2011 1 Kodai Niitsu, Toshihiro Omori, Ryosuke Kainuma Superelasticity at Low Temperatures in Cu-17Al-15Mn (at%) Shape Memory Alloy MATERIALS TRANSACTIONS 52 8 1713 1715 https://doi.org/10.2320/matertrans.m2011128 2024-04-20 13:47:01 +0900 Paper 2011 2 K. Niitsu, T. Omori, M. Nagasako, K. Oikawa, R. Kainuma, K. Ishida Phase transformations in the B2 phase of Co-rich Co–Al binary alloys Journal of Alloys and Compounds 509 6 2697 2702 https://doi.org/10.1016/j.jallcom.2010.11.130 2024-04-20 13:47:01 +0900