Eita Tochigi




Yayoi 2-11-16, Bunkyo-ku, Tokyo, Japan, 113-8656
Phone +81-3-5841-7689
Fax +81-3-5841-7694
mail: tochigi＿sigma.t.u-tokyo.ac.jp(please insert @ instead of space)



Contents

  • Profile
  • Current Research
  • Publication list


    • Profile


    　　　　　　　　　　　　

    Education

  • BEng, Department of Materials Engineering, Hokkaido University, Japan, 2006
    • 　　　　　　　　　　　　　　　　
  • MEng, Department of Materials Engineering, The University of Tokyo, Japan, 2008
  • PhD, Department of Materials Engineering, The University of Tokyo, Japan, 2011


    • Professional Experience

    　
  • March, 2013 – present: Assistant Professor, Institute of Engineering Innovation, The University of Tokyo
  • July, 2011 – March, 2013: Postdoctoral Research Fellow (JSPS Postdoctoral Research Fellow for Research Abroad), National Center for Electron Microscopy, Lawrence Berkeley National Laboratory
  • April, 2011 – June, 2011: Postdoctoral Research Fellow, Institute of Engineering Innovation, The University of Tokyo
  • April, 2009- March, 2011: Research Fellow of the Japan Society for the Promotion of Science (DC2)


    • Professional Specialty

  • Materials Science, Transmission Electron Microscopy


    • Professional Society

  • Member of The Japan Institute of Metals
  • The Japanese Society of Microscopy




    • Current Research



    High-resolution TEM/STEM analysis of lattice defects



    In-situ TEM investigation of dynamic behavior of lattice defects





    Publication list



    International peer-reviewed articles

    1. C. Yang, B. Feng, J. Wei, E. Tochigi, S. Ishihara, N. Shibata, and Y. Ikuhara, "Atomic and electronic band structures of Ti-doped Al2O3 grain boundaries",Acta Materialia, 201, 488-93(2020).

    2. H. Nakade, E. Tochigi, B. Feng, Y. Nezu, H. Ohta, N. Shibata, Y. Ikuhara, “Fabrication and characterization of tetragonal yttria-stabilized zirconia single-crystalline thin film,"JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 104[3], 1198-1203(2020).

    3. S. Ishihara, E. Tochigi, R. Ishikawa, N. Shibata, Y. Ikuhara, "Atomic structures of Ti‐doped α‐Al2O3 Σ13 grain boundary with a small amount of Si impurity," Jounal of American Ceramic Society, 103, 6659–6665(2020).

    4. B. Miao, S. Kondo, E. Tochigi, J. K. Wei, B. Feng, N. Shibata, and Y. Ikuhara, "The core structure of 60 degrees mixed basal dislocation in alumina (alpha-Al2O3) introduced by in situ TEM nanoindentation," Scripta Materialia, 163 157-62 (2019).

    5. Y. Kezuka, E. Tochigi, H. Murata, M. Yoshida, K. Eguchi, A. Nakahira, Y. Ikuhara, and M. Tajika, "Synthesis of Tunable-Aspect-Ratio Calcite Nanoparticles via Mg2+ Doping," Crystal Growth & Design, 19[11] 6784-91 (2019)

    6. YW. Kim, E. Tochigi, J. Tatami, YH. Kim, SH. Jang, S. Javvaji, J. Jung, KJ. Kim, Y. Ikuhara, “Carrier Depletion near the Grain Boundary of a SiC Bicrystal”, Scientific Reports 9, 18014(2019)

    7. S. Kondo, A. Ishihara, E. Tochigi, N. Shibata, and Y. Ikuhara, "Direct observation of atomic-scale fracture path within ceramic grain boundary core," Nature Communications, 10 , 2112(2019).

    8. S. Ishihara, E. Tochigi, R. Ishikawa, N. Shibata, and Y. Ikuhara, "Coexistence of two different atomic structures in the sigma 13 pyramidal twin boundary in alpha-Al2O3," Philosophical Magazine Letters. 99, 12, 435-443 (2019)

    9. E. Tochigi, M. Bin, S. Kondo, A. Nakamura, N. Shibata, Y. Ikuhara, “2pA_SS3-8 Investigations of deformation twinning in sapphire by in situ TEM indentation and atomic-resolution STEM”, Microscopy 67, S2, i22-i22(2018).

    10. E. Tochigi, T. Mizoguchi, E. Okunishi, A. Nakamura, N. Shibata, and Y. Ikuhara, "Dissociation reaction of the 1/3 <(1)over-bar101 > edge dislocation in alpha-Al2O3," Journal of Materials Science, 53[11] 8049-58 (2018).

    11. E. Tochigi, A. Nakamura, N. Shibata, and Y. Ikuhara, "Dislocation Structures in Low-Angle Grain Boundaries of alpha-Al2O3," Crystals, 8[3] (2018).

    12. A. Nakamura, E. Tochigi, R. Nagahara, Y. Furushima, Y. Oshima, Y. Ikuhara, T. Yokoi, and K. Matsunaga, "Structure of the Basal Edge Dislocation in ZnO," Crystals, 8[3] (2018).

    13. J. Hoemke, E. Tochigi, T. Tohei, H. Yoshida, N. Shibata, Y. Ikuhara, and Y. Sakka, "Inversion domain network stabilization and spinel phase suppression in ZnO," Journal of the American Ceramic Society, 101[6] 2616-26 (2018).

    14. Y. Furushima, A. Nakamura, E. Tochigi, Y. Ikuhara, K. Toyoura, and K. Matsunaga, "<10 1¯0> Dislocation at a {2 1¯ 1¯0} low-angle grain boundary in LiNbO3," Journal of Materials Science, 53[1] 333-44 (2018).

    15. A. Nakamura, K. Matsunaga, E. Tochigi, N. Shibata, Y. Ikuhara, and K. P. D. Lagerlof, “Another origin of yield drop behavior in sapphire deformed via basal slip: Recombination of climb-dissociated partial dislocations,”Scr. Mater., 138 109-13 (2017).

    16. J. Hoemke, E. Tochigi, T. Tohei, H. Yoshida, N. Shibata, Y. Ikuhara, and Y. Sakka, “Inversion domain boundaries in Mn and Al dual-doped ZnO: Atomic structure and electronic properties,”J. Am. Ceram.Soc., 100[9] 4252-62 (2017).

    17. Eita Tochigi, Yuki Kezuka, Akiho Nakamura, Atsutomo Nakamura, Naoya Shibata, Yuichi Ikuhara, "Direct Observation of Impurity Segregation at Dislocation Cores in an Ionic Crystal," Nano Lett., 17[5] 2908-12 (2017).

    18. Peng Gao, Ryo Ishikawa, Eita Tochigi, Akihito Kumamoto, Naoya Shibata, Yuichi Ikuhara, "Atomic-Scale Tracking of a Phase Transition from Spinel to Rocksalt in Lithium Manganese Oxide," Chemistry of Materials 29, 1006-1016, (2017). DOI:10.1021/acs.chemmater.6b03659

    19. Eita Tochigi, Hirofumi Matsuhata, Hirotaka Yamaguchi, Takashi Sekiguchi, Hajime Okumura, Yuichi Ikuhara, "Investigation of V-shaped extended defects in a 4H–SiC epitaxial film," Philosophical Magazine 97, 657-670, (2017). DOI:10.1080/14786435.2016.1275869

    20. Yuho Furushima, Atsutomo Nakamura, Eita Tochigi, Yuichi Ikuhara, Toyoura Kazuaki, Matsunaga Katsuyuki, "Dislocation structures and electrical conduction properties of low angle tilt grain boundaries in LiNbO3," Journal of Applied Physics 120, 142107, (2016). DOI:10.1063/1.4961706

    21. Takaaki Sato, Eita Tochigi, Teruyasu Mizoguchi, Yuichi Ikuhara, Hiroyuki Fujita, "An experimental system combined with a micromachine and double-tilt TEM holder," Microelectronic Engineering 164, 43-47, (2016). DOI:10.1016/j.mee.2016.06.018

    22. Haijun Yu, Yeong-Gi So, Akihide Kuwabara, Eita Tochigi, Naoya Shibata, Tetsuichi Kudo, Haoshen Zhou, Yuichi Ikuhara, “Crystalline grain interior configuration affects lithium migration kinetics in Li-rich layered oxide”,Nano Letters 16, 2907-2915, (2016). DOI:10.1021/acs.nanolett.5b03933

    23. Joshua HOEMKE, Atta Ullah KHAN, Hidehiro YOSHIDA, Takao MORI, Eita Tochigi, Naoya SHIBATA, Yuichi IKUHARA, Yoshio SAKKA, “Sintering characteristics and thermoelectric properties of Mn–Al co-doped ZnO ceramics”, Journal of Ceramics Society of Japan, 124, 5, 515-522 (2016). DOI: 10.2109/jcersj2.15282

    24. Si-Young, Choi, Sung-Dae Kim, Minseok Choi, Hak-Sung Lee, Jungho Ryu, Naoya, Shibata, Teruyasu Mizoguchi, Eita Tochigi, Takahisa Yamamoto, Suk-Joong Kang, Yuichi Ikuhara, “Assessment of strain-generated oxygen vacancies using SrTiO3”, Nano Letters, 15, 4129-4134 (2015). DOI: 10.1021/acs.nanolett.5b01245

    25. Eita Tochigi, Atsutomo Nakamura, Teruyasu Mizoguchi, Naoya Shibata, Yuichi Ikuhara, “Dissociation of the 1/3<-1101> Dislocation and Formation of the Anion Stacking Fault on the Basal Plane in α-Al2O3”, Acta Mater., 91, 152-161 (2015). DOI: 10.1016/j.actamat.2015.02.033

    26. Shin-ichi Okuoka, Yoshiyuki Ogasawara, Yosuke Suga, Mitsuhiro Hibino, Tetsuichi Kudo, Hironobu Ono, Yasutaka Sumida, Koji Yonehara, Yuki Yamada, Atsuo Yamada, Masaharu Oshima, Eita Tochigi, Naoya Shibata, Yuichi Ikuhara, and Noritaka Mizuno, “A New Sealed Lithium-Peroxide Battery with a Co-Doped Li2O Cathode in a Superconcentrated Lithium Bis(fluorosulfonyl)amide Electrolyte”, Scientific Reports, 4, 5684 (2014).

    27. E. Tochigi, E. Zepeda-alarcon, H. –R. Wenk, A. M. Minor, “In situ TEM observations of plastic deformation in quartz crystals”, Phys. Chem. Miner., 41, 757-765 (2014). DOI: 10.1007/s00269-014-0689-6

    28. Mitsuhiro Hibino, Ryuji Harimoto, Yoshiyuki Ogasawara, Ryota Kido, Akira Sugahara, Tetsuichi Kudo, Eita Tochigi, Naoya Shibata, Yuichi Ikuhara, and Noritaka Mizuno, “A new rechargeable sodium battery utilizing reversible topotactic oxygen extraction/insertion of CaFeOz(2.5 ≤ z ≤ 3) in an organic electrolyte”, Journal of the American Chemical Society, [136] 1, 448-494 (2014). DOI: 10.1021/ja411365z

    29. Kenji Tsuruta, Eita Tochigi, Yuki Kezuka, Kazuaki Tanaka, Naoya Shibata, Atsutomo Nakamura, and Yuichi Ikuhara, “Core structure and dissociation energetics of basal edge dislocation in α-Al2O3: A combined atomistic-simulation and transmission-electron-microscopy analysis”. Acta Mater., [65], 76-84 (2014).

    30. A. Nakamura, E. Tochigi, J. Nakamura, I. Kishida, and Y. Yokogawa, “Dislocation structure as a {-12-10}/<10-10> low-angle tilt grain boundary in LiNbO3”, J. Mater. Sci., [47], 5086-5096 (2012).

    31. S. Kondo, N. Shibata, T. Mitsuma, E. Tochigi, and Y. Ikuhara, “Dynamic observations of dislocation behavior in SrTiO3 by in situ nanoindentation in a transmission electron microscope”, Appl. Phys. Lett., [100], 181906 (2012).

    32. E. Tochigi, Y. Kezuka, N. Shibata, A. Nakamura and Y. Ikuhara, “Structure of screw dislocations in a (0001)/[0001] low-angle twist grain boundary of alumins (α-Al2O3)”, Acta Mater., [60], 1293-1299 (2012).

    33. T. Mizoguchi, K. Matsunaga, E. Tochigi, and Y. Ikuhara, “First principles pseudopotential calculation of electron energy loss near edge structure of lattice imperfections”, Micron, [43] 37-42 (2012).

    34. Y. Kezuka, E. Tochigi, N. Shibata, and Y. Ikuhara, “TEM analysis of dislocation structures formed in the Cr-doped grain boundary of alumina”, J. Ceram. Soc. Jpn., [119] 817-821 (2011).

    35. Y. Kezuka, E. Tochigi, N. Shibata, C. Moon, S. Kanehira, K. Hirao, and Y. Ikuhara, “Formation of a Cr3+ - rich luminescent thin phase along a grain boundary of α-Al2O3”, J. Ceram. Soc. Jpn., [119], 620-622 (2011).

    36. E. Tochigi, N. Shibata, A. Nakamura, T. Yamamoto and Y. Ikuhara, “Dislocation Structures in a {-1104} / <11-20> Low-angle Tilt Grain Boundary of Alumina (α-Al2O3)”, J. Mater. Sci., [46] 4428-4433 (2011).

    37. H. Hojo, E. Tochigi, T. Mizoguchi, H. Ohta, N. Shibata, B. Feng and Y. Ikuhara, “Atomic Structure and strain field of threading dislocations in CeO2 thin films on yttria-stabilized ZrO2”, Appl. Phys. Lett., [98], 153104 (2011).

    38. C. Moon, S. Kanehira, K. Miura, E. Tochigi, N. Shibata, Y. Ikuhara and K. Hirao, “Morphology change from nanocrack to periodic pore array formed by femtosecond laser pulses”, J. Appl. Phys., [109], 013517 (2011).

    39. Y. Nohara, E. Tochigi, N. Shibata, T. Yamamoto and Y. Ikuhara, “Dislocation structures and strain fields in [111] low-angle tilt grain boundaries in zirconia”, J. Electron Microsc, [59], S117-S121 (2010).

    40. E. Tochigi, N. Shibata, A. Nakamura, T. Mizoguchi, T. Yamamoto and Y. Ikuhara, “Structures of dissociated <1-100> dislocations and {1-100} stacking faults of alumina (α-Al2O3)”, Acta Mater., [58], 208-215 (2010).

    41. C. Moon, S. Kanehira, M. Nishi, K. Miura, T. Nakaya, E. Tochigi, N. Shibata, Y. Ikuhara and K. Hirao, “Crack propagation in a ruby sigle crystal by femtosecond laser irradiation”, J. Am. Ceram. Soc., [12], 3118-3121 (2009).

    42. A. Nakamura, E. Tochigi, N. Shibata, T. Yamamoto and Y. Ikuhara, “Structure and Configuration of Boundary Dislocations on Low Angle Tilt Grain Boundaries in Alumina”, Mater. Trans., [50], 1008-1014 (2009).

    43. E. Tochigi, N. Shibata, A. Nakamura, T. Yamamoto and Y. Ikuhara, “Partial dislocation configurations in a low-angle boundary in α-Al2O3”, Acta Mater., [56], 2015-2021 (2008).

    Conference proceedings

    1. Joshua Hoemke1, Atta Ullah Khan, Hidehiro Yoshida, Takao Mori, Eita Tochigi, Naoya Shibata, Yuichi Ikuhara, Yoshio Sakka, “Microstructural Analysis and Thermoelectric Properties of Sn-Al co-doped ZnO Ceramics”, AIP Conference Proceedings, accepted.

    2. Eita Tochigi, Scott D. FINDRAY, Eiji OKUNISHI, Teruyasu MIZOGUCHI, Atsutomo NAKAMURA, Naoya SHIBATA, Yuichi IKUHARA,” Atomic Structure Characterization of Stacking Faults on the {1-100} plane in α-Alumina by Scanning Transmission Electron Microscopy” AIP Conference Proceedings, accepted.

    3. E. Tochigi, E. Zepeda, H.-R. Wenk, A. M. Minor,"In Situ TEM Observation of Twinning, Detwinning and Retwinning in Quartz", MEMS AND NANOTECHNOLOGY, 5, pp. 31-34, (2016). (Conference Proceedings of the Society for Experimental Mechanics Series)

    4. 栃木栄太, 中村篤智, 柴田直哉, 幾原雄一," TEMその場ナノインデンテーション法によるアルミナにおける機械的双晶の動的観察", M&M材料力学カンファレンス 2015, in press.

    5. 栃木栄太, 中村篤智, 柴田直哉, 幾原雄一," TEMその場機械試験法によるセラミックスの微視的変形の動的観察", 日本機械学会年次大会、F221002-1-F221002-2, 2014-09-07, (2014)

    6. 栃木栄太, Zepeda-alarcon Eloisa, Wenk Hans-Rudolf, Minor Andrew M.," 透過型電子顕微鏡その場圧縮試験によるα-クオーツのDAUPHINE双晶の動的観察", M&M材料力学カンファレンス 2014、OS1101-1-OS1101-2 2014-07-19 (2014).12. E. Tochigi, Y. Kezuka, A. Nakamura, N. Shibata, Y. Ikuhara,"The Structure of Screw Dislocations in an α-Al2O3 Bicrystal with a Low-angle Twist Grain Boundary", AMTC Letters, 4, pp. 8-9, (2014).

    7. A. Nakamura, Y. Furushima, E. Tochigi, Y. Ikuhara, K. Toyoura, K. Matsunaga,"Boundary Dislocations at a Low Angle Grain Boundary Including Twist Component in LiNbO3", AMTC Letters, 4, pp. 20-21, (2014).

    8. S. Kondo, T. Mistuma, E. Tochigi, N. Shibata, and Y. Ikuhara, “Real-time observations of deformation in ceramics by in situ TEM nanoindentation”, AMTC Letters, [3], 90-91 (2012).

    9. A. Nakamura, J. Nakamura, T. Yamamoto, I. Kishida, Y. Yokogawa, and E. Tochigi, “Dislocation structure of low angle tilt grain boundaries in LiNbO3”, AMTC Letters [3], 40-41 (2012).

    10. Y. Kezuka, E. Tochigi, N. Shibata, C. Moon, S. Kanehira, K. Hirao, and Y. Ikuhara, “Structural analysis of Cr-rich luminescent phase formed along an alumina grain boundary”, AMTC Letters, [3], 10-11 (2012).

    11. A. Nakamura, I. Okawa, J. Nakamura, E. Tochigi, I. Kishida and Y. Yokogawa, “Influence of the titanium doping on 2o tilt grain boundaries in LiNbO3”, AMTC Letters, [2], 246-247 (2010).

    12. E. Tochigi, N. Shibata, A. Nakamura, T. Mizoguchi, T. Yamamoto and Y. Ikuhara, “HRTEM observations of stacking fault on the {1-100} planes in sapphire (α-Al2O3)”, AMTC Letters, [2], 220-221 (2010).

    13. E. Tochigi, N. Shibata, A. Nakamura, T. Yamamoto and Y. Ikuhara, “Dissociated dislocations in low-angle grain boundary of alumina”, AMTC Letters, [1], 232-233 (2008).

    14. Y. Nohara, E. Tochigi, N. Shibata, T. Yamamoto and Y. Ikuhara, “Atomic structures of [111] low-angle tilt grain boundaries in zirconia bicrystals”, AMTC Letters, [1], 22-23 (2008).

    15. E. Tochigi, N. Shibata, A. Nakamura, T. Yamamoto and Y. Ikuhara, “TEM characterization of 2º tilt grain boundary in alumina”, Mater. Sci. Forum, [561-565], 2427-2430 (2007).

    16. A. Nakamura, E. Tochigi, N. Shibata, T. Yamamoto and Y. Ikuhara, “Dislocation structure analysis of low angle tilt grain boundaries in alumina by elastic theory”, Mater. Sci. Forum, [561-565], 2465-2468 (2007).

    17. E. Tochigi, A. Nakamura, N. Shibata, T. Yamamoto, K.P.D. Lagerlöf and Y. Ikuhara, “Dislocation structure of 10º low-angle tilt grain boundary in α-Al2O3”, Mater. Sci. Forum, [527-529], 979-982 (2007).

    Articles

    1. 栃木栄太、「アルミナにおける小角粒界を用いた転位設計と構造解析」、日本金属学会「まてりあ」新進気鋭、第54巻　第8号　409-412 (2015).
      “Design and Analysis of Dislocations Using Low-angle Grain Boundaries of Alumina”

    2. 栃木栄太、柴田直哉、幾原雄一、「アルミナ転位の構造解析」、日本学術振興会第133委員会50周年記念誌、2013年6月発行　239頁-244頁

    3. 栃木栄太、柴田直哉、中村篤智、山本剛久、幾原雄一、「アルミナ小傾角粒界に形成された特異部分転位構造のTEM解析」日本金属学会会報　「まてりあ」, 2009年12月号600頁 [“TEM observations of characteristic partial dislocation structures in an alumina low-angle grain boundary” JIM Mtere2, Vol.48 No.12, 600 (2009)]. (Japanese)

    4. 中村篤智、栃木栄太、柴田直哉、山本剛久、幾原雄一、「ねじり成分によるアルミナ小傾角粒界の構造変化」マテリアル　インテグレーション, 2009年9月号57～64頁 [“Multiplicity of boundary dislocations on a low-angle tilt grain boundary including twist component in alumina” Material Integration, Vol.22 No.9, 57-64 (2009)]. (Japanese)

    awards

    1. 栃木栄太、第24回日本金属学会奨励賞「組織部門」、2014年9月24日

    2. Eita Tochigi, Yuki Kezuka, Atsutomo Nakamura, Naoya Shibata, Yuichi Ikihara, “Screw Dislocation Network in Alumina”, Science as Art 2nd Prize (Photo Competition), MRS Fall meeting 2012, Hynes Convention Center, Boston, USA, (Nov. 29, 2012)

    3. 栃木栄太、毛塚雄己、柴田直哉、幾原雄一、中村篤智、「アルミナ小角ねじり粒界のPlan‐view観察」、日本セラミックス協会学術写真賞　最優秀賞、2012年3月20日

    4. 栃木栄太、”In situ TEM nanoindentation study of {1-102}<-1101> Twin formation in α-Al2O3”, 風戸研究奨励会　国際会議発表渡航助成、International Microscopy Congress (IMC17), M19.16, Rio de Janeiro, Brazil (Sep. 19-24, 2010). [poster presentation]

    5. E. Tochigi, N. Shibta, A. Nakamura, T. Yamamoto and Y. Ikuhara, “Nucleation process and interface structure of {1-102}<-1101> twin in α-Al2O3”, XIII International conference on intergranular and interphase boundaries in materials (iib2010), P-C13, Shima (Mie), Japan (June. 27-July. 2, 2010). Poster Award, July. 2, 2010

    6. 栃木栄太、柴田直哉、中村篤智、山本剛久、幾原雄一、「アルミナ小傾角粒界を用いた転位構造制御」、日本金属学会　第59回金属組織写真賞　奨励賞　2009年3月28日

    7. 栃木栄太、「アルミナ小傾角粒界を用いた転位構造制御」、日本金属学会　第一回格子欠陥制御工学研究会　若手優秀講演賞　2008年9月27日