論文

• Tomohide Morikawa, Masanori Kodera, Takao Shimizu, Keisuke Ishihama, Yoshitaka Ehara, Osami Sakata, Hiroshi Funakubo. Domain structure of PbTiO3 and Pb(Zr, Ti)O3 thin films controlled by tensile strain induced from Sr(Zr,Ti)O3 buffer layer, Appl. Phys. Lett., vol. 124, pp. 032901, Jan. 2024.
• Reika Ota, Shinnosuke Yasuoka, Ryoichi Mizutani, Takahisa Shiraishi, Kazuki Okamoto, Kuniyuki Kakushima, Tomoyuki Koganezawa, Osami Sakata, Hiroshi Funakubo. Scalable ferroelectricity of 20-nm-thick (Al0.8Sc0.2)N thin films sandwiched between TiN electrodes, J. Appl. Phys., vol. 134, pp. 214103-1-6, Dec. 2023.
• Xueyou Yuan, Kazuki Okamoto, Mitsuki Kawano, Masahito Yoshino, Takanori Nagasaki, Yasuhiko Imai, Osami Sakata, Tomoaki Yamada. Extraordinarily Large Contribution Ratio of Ferroelastic Domain Switching to Piezoresponse in Monoclinic (K, Na)NbO3 Films, Advanced Electronic Materials, Oct. 2023.
• Shinnosuke YASUOKA, Ryoichi MIZUTANI, Reika OTA, Takahisa SHIRAISHI, Takao SHIMIZU, Shintaro YASUI, Yoshitaka EHARA, Ken NISHIDA, Masato UEHARA, Hiroshi YAMADA, Morito AKIYAMA, Yasuhiko IMAI, Osami SAKATA, Hiroshi FUNAKUBO. Enhancement of crystal anisotropy and ferroelectricity by decreasing thickness in (Al,Sc)N films, J. Ceram. Soc. Jpn., Vol. 130, No. 7, pp. 436-441, July 2022.
• Yoshiharu Ito, Akinori Tateyama, Rurika Kubota, Takahisa Shiraish, Takao Shimizu, Osami Sakata, Jaemyung Kim, Minoru Kurosawa, Hiroshi Funakubo. Polar-axis oriented epitaxial tetragonal (Bi,K)TiO3 films deposited below Curie temperature by hydrothermal method, Appl. Phys. Lett., Vol. 120, pp. 022903, Jan. 2022.
• Takanori Mimura, Takao Shimizu, Yoshio Katsuya, Osami Sakata, Hiroshi Funakubo. Thickness dependence of phase stability in epitaxial (HfxZr1-x)O2 films, Physical review materials, Vol. 5, pp. 114407, Nov. 2021.
• Ryoichi Mizutani, Shinnosuke Yasuoka, Takahisa Shiraishi, Takao Shimizu, Masato Uehara, Hiroshi Yamada, Morito Akiyama, Osami Sakata, Hiroshi Funakubo. Thickness scaling of (Al0.8Sc0.2)N films with remanent polarization beyond 100 μC/cm2 around 10 nm in thickness, Appl. Phys. Exp., Vol. 14, pp. 105501, Sept. 2021.
• Loku Singgappulige Rosantha Kumara, Kyohei Ishikawa, Keisuke Ide, Hideo Hosono, Toshio Kamiya, Osami Sakata. Local Structure Properties of Hydrogenated and Nonhydrogenated Amorphous In-Ga-Zn-O Thin Films Using XAFS and High-Energy XRD, J. Phys. Chem. C, 125, 13619–13628, June 2021.
• Ryo Wakabayashi, Kohei Yoshimatsu, Mai Hattori, Jung-Soo Lee, Osami Sakata, Akira Ohtomo. Epitaxial Stabilization of Complete Solid-solution β-(AlxGa1–x)2O3 (100) Films by Pulsed-laser Deposition, Cryst. Growth Des., Vol. 21, No. 5, Page 2844-2849, Apr. 2021.
• Takanori Mimura, Takao Shimizu, Osami Sakata, Hiroshi Funakubo. Large Thermal hysteresis of ferroelectric transition in HfO2-based ferroelectric films, Appl. Phys. Let., vol. 118, pp. 112903, Mar. 2021.
• Takao Shimizu, Yuki Tashiro, Takanori Mimura, Takanori Kiguchi, Takahisa Shiraishi, Toyohiko J. Konnno, Osami Sakata, Hiroshi Funakubo. Electric-field-induced ferroelectricity in 5%Y-doped Hf0.5Zr0.5O2: Transformation from the paraelectric tetragonal phase to the ferroelectric orthorhombic phase, Physica Status Solidi, vol. 15, no. 5, pp. 2000589-1-7, Feb. 2021.
• Daichi Ichinose, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Yoshitaka Ehara, Hirosh Funakubo. Domain structure transition in compressive strained (100)/(001) epitaxial tetragonal PZT film, J. Appl. Phys., vol. 129, pp. 024101-1-6, Jan. 2021.
• Yohei Onodera, Shinji Kohara, Philip S. Salmon, Akihiko Hirata, Norimasa Nishiyama, Suguru Kitani, Anita Zeidler, Motoki Shiga, Atsunobu Masuno, Hiroyuki Inoue, Shuta Tahara, Annalisa Polidori, Henry E. Fischer, Tatsuya Mori, Seiji Kojima, Hitoshi Kawaji, Alexander I. Kolesnikov, Matthew B. Stone, Matthew G. Tucker, Marshall T. McDonnell, Alex C. Hannon, Yasuaki Hiraoka, Ippei Obayashi, Takenobu Nakamura, Jaakko Akola, Yasuhiro Fujii, Koji Ohara, Takashi Taniguchi, Osami Sakata. Structure and properties of densified silica glass: characterizing the order within disorder, NPG Asia Materials, Springer Nature, 12, Dec. 2020.
• Kazuki Okamoto, Tomoaki Yamada, Kentaro Nakamura, Hidenori Takana, Osami Sakata, Mick Phillips, Takanori Kiguchi, Masahito Yoshino, Hiroshi Funakubo, Takanori Nagasaki. Enhanced intrinsic piezoelectric response in (001)-epitaxial single c-domain Pb(Zr,Ti)O3 nanorods, Appl. Phys. Lett., vol. 117, pp. 042905-1-5, July 2020.
• jun mizushiro, kohei yoshimatsu, naoki ohashi, masahiko tanaka, osami sakata, akira ohtomo. Optical and structural investigations on titanium oxynitride films for visible-UV photocatalytic applications, Journal of Applied Physics, Vol. 127, No. 135301, Page 6, Apr. 2020.
• Takanori Mimura, Takao Shimizu, Yoshio Katsuya, Osami Sakata, Hiroshi Funakubo. Thickness- and orientation- dependences of Curie temperature in ferroelectric epitaxial Y doped HfO2 films, Jpn. J. Appl. Phys., Vol. 59, pp. SGGB04-1-6, Feb. 2020.
• Hyeon Jun Lee, Takao Shimizu, Hiroshi Funakubo, Yasuhiko Imai, Osami Sakata, Seung Hyun Hwang, Tae Yeon Kim, Changjae Yoon, Cheng Dai, Long Q. Chen, Su Yong Lee, Ji Young Jo. Electric-Field-Driven Nanosecond Ferroelastic-Domain Switching Dynamics in Epitaxial Pb(Zr,Ti)O3 Film, Phys. Rev. Lett., Vol. 123, pp. 217601, Nov. 2019.
• Yoshitaka Ehara, Takao Shimizu, Shintaro Yasui, Takahiro Oikawa, Takahisa Shiraishi, Hiroki Tanaka, Noriyuki Kanenko, Ronald Maran, Tomoaki Yamada, Yasuhiko Imai, Osami Sakata, Nagarajan Valanoor, Hiroshi Funakubo. Ferroelastic Domain Motion by Pulsed Electric Field in (111)/(11¯1 ) Rhombohedral Epitaxial Pb(Zr_0.65Ti_0.35)O₃ Thin Films: Fast Switching and Rrelaxation, Physical Review B, vol. 100, pp. 104116 1-7, Sept. 2019.
• K. Yoshimatsu, J. Ishimaru, K. Watarai, K. Yamamoto, Y. Hirata, H. Wadati, Y. Takeda, K. Horiba, H. Kumigashira, O. Sakata, A. Ohtomo. Magnetic and electronic properties of B-site-ordered double-perovskite oxide La2CrMnO6 thin films, Physical Review B, Vol. 99, June 2019.
• Takanori Mimura, Takao Shimizu, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Yoshio Katsuya, Osami Sakata, Hiroshi Funakubo. Effects of heat treatment and in-situ high temperature XRD study on the formation of ferroelectric epitaxial Y doped HfO2 film., Jpn. J. Appl. Phys., Vol. 58, pp. SBBB09-1-5, Feb. 2019.
• Takao Shimizu, Takanori Mimura, Takanori Kiguchi, Takahisa Shiraishi, Toyohiko Konno, Yoshio Katsuya, Osami Sakata, Hiroshi Funakubo. Ferroelectricity mediated by ferroelastic domain switching in HfO2-based epitaxial thin films, Appl. Phys. Lett., Vol. 113, pp. 212901-1-5, Nov. 2018.
• Takanori Mimura, Takao Shimizu, Hiroshi Uchida, Osami Sakata, Hiroshi Funakubo. Thickness-dependent crystal structure and electric properties of epitaxial ferroelectric Y2O3-HfO2 films, Appl. Phys. Lett., Vol. 113, pp. 102901-1-4, Sept. 2018.
• Daichi Ichinose, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Hiroshi Funakubo. Domain structure transition from two to three dimensions in tensile strained (100)/ (001)-oriented epitaxial tetragonal PZT film, Appl. Phys. Lett., Vol. 113, pp. 132905-1-5, Sept. 2018.
• Tomoya Sato, Daichi Ichinose, Naoya Oshima, Takanori Mimura, Yuichi Nemoto, Takao Shimizu, Yasuhiko Imai, Hiroshi Uchida, Osami Sakata, Hiroshi Funakubo. Time response demonstration of in-situ lattice deformation under an applied electric field using synchrotron-based time-resolved XRD in polar-axis-oriented epitaxial Pb(Zr,Ti)O3 film, Jpn. J. Appl. Phys., Vol. 57, pp. 0902B8-1-5, June 2018.
• Azatuhi Ayrikyan, Olena Prach, Neamul H. Khansur, Stephanie Keller, Shintaro Yasui, Mitsuru Itoh, Osami Sakata, Karsten Durst, Kyle G. Webber. Investigation of Residual Stress in Lead-Free BNT-Based Ceramic/Ceramic Composites, Acta Materialia, vol. 148, pp. 432-441, Mar. 2018.
• Miki Noda Fukuya, Kazunobu Senoo, Masaru Kotera, Mamoru Yoshimoto, Osami Sakata. Change in the Crystallite Orientation of Poly(ethylene oxide)/Cellulose Nanofiber Composite Films, Biomacromolecules, Vol. 18, pp. 4411-4415, Nov. 2017.
• Takahisa Shiraishi, Kiliha Katayama, Tatsuhiko Yokouchi, Takao Shimizu, Takahiro Oikawa, Osami Sakata, Hiroshi Uchida, Yasuhiko Imai, Takanori Kiguchi, Toyohiko J. Konno, Hiroshi Funakubo. Effect of the film thickness on the crystal structure and ferroelectric properties of (Hf0.5Zr0.5)O2 thin films deposited on various substrates, Materials Science in Semiconductor Processing, vol. 70, pp. 239–245, Nov. 2017.
• K. Yoshimatsu, Osami Sakata, A. Ohtomo. Superconductivity in Ti₄O₇ and γ-Ti₃O₅ films, Scientific Reports, Vol. 7, pp. 12544, Oct. 2017.  公式リンク  
  
• Seiji Nakashima, Osami Sakata, Hiroshi Funakubo, Takao Shimizu, Daichi Ichinose, Kota Takayama, Yasuhiko Imai, Hironori Fujisawa, Masaru Shimizu. Electric-field-induced lattice distortion in epitaxial BiFeO3 thin films as determined by in situ time-resolved x-ray diffraction, Appl. Phys. Lett., vol. 111, pp. 082907-1-5, Aug. 2017.
• Tomoaki Yamada, Daisuke Ito, Tomas Sluka, Osami Sakata, Hidenori Tanaka, Hiroshi Funakubo, Takahiro Namazu, Naoki Wakiya, Masahito Yoshino, Takanori Nagasaki, Nava Setter. Charge screening strategy for domain pattern control in nano-scale ferroelectric systems, Science Reports, vol. 7, pp. 5236-1-9, July 2017.
• H. Kurokawa, K. Yoshimatsu, Osami Sakata, A. Ohtomo. Effects of phase fraction on superconductivity of low-valence eutectic titanate films, Journal of Applied Physics, Vol. 122, 5, July 2017.
• Daichi Ichinose, Takaaki Nakashima, Yoshitaka Ehara, Takahiro Oikawa, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Hiroshi Funakubo. Orientation change with substrate type and composition in (100)/(001)-oriented epitaxial tetragonal Pb(Zrx Ti1−x)O3 films, Journal of the Ceramic Society of Japan, vol. 125, no. 6, pp. 458-462, June 2017.
• Takao Shimizu, Kiliha Katayama, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. The demonstration of significant ferroelectricity in epitaxial Y-doped HfO2 film, Sci. Rep., vol. 6, pp. 32931, Sept. 2016.
• Kiliha Katayama, Takao Shimizu, Osami Sakata, Takahisa Shiraishi, Syogo Nakamura, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Hiroshi Uchida, Hiroshi Funakubo. Growth of (111)-oriented epitaxial and textured ferroelectric Y-doped HfO2 films for downscaled devices, Appl. Phys. Lett., vol. 109, pp. 112901-1-5, Sept. 2016.
• Tomoaki Yamada, Youhei Ebihara, Takanori Kiguchi, Osami Sakata, Hitoshi Morioka, Takao Shimizu, Hiroshi Funakubo, Toyohiko J. Konno, Masahito Yoshino, Takanori Nagasaki. Fabrication and characterization of (111)-epitaxial Pb(Zr0.35Ti0.65)O3/Pb(Zr0.65Ti0.35)O3 artificial superlattice thin films, Jpn. J. Appl. Phys., vol. 55, pp. 10TA20-1-5, Sept. 2016.
• Takanori Mimura, Kiliha Katayama, Takao Shimizu, Hiroshi Uchida, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Formation of (111) orientation-controlled ferroelectric orthorhombic HfO2 thin films from solid phase via annealing, Appl. Phys. Lett., vol. 109, pp. 052903-1-4, Aug. 2016.
• Yosuke Hamasaki, Takao Shimizu, Shintaro Yasui, Tomoyasu Taniyama, Osami Sakata, Mitsuru Itoh. Crystal Isomers of ScFeO₃, Crystal Growth & Design, vol. 16, No. 9, pp. 5214-5222, July 2016.
• Takahisa Shiraishi, Kiliha Katayama, Tatsuhiko Yokouchi, Takao Shimizu, Takahiro Oikawa, Osami Sakata, Hiroshi Uchida, Yasuhiko Imai, Takanori Kiguchi, Toyohiko J. Konno, Hiroshi Funakubo. Impact of mechanical stress on ferroelectricity in (Hf0.5Zr0.5)O2 thin films, Appl. Phys. Lett., vol. 108, pp. 262904-1-5, June 2016.
• Daisuke Ito, Tomoaki Yamada, Osami Sakata, Junki Kuroishi, Takahiro Namazu, Hiroshi Funakubo, Masahito Yoshino, Takanori Nagasaki. Fabrication of Tetragonal Pb(Zr,Ti)O3 Nanorodsby Focused Ion Beam and Characterization of the Domain Structure, IEEE Ultrasonics, Ferroelectrics, and Frequency Control Society, vol. 63, no. 10, pp. 1642-1646, May 2016.
• Kiliha Katayama, Takao Shimizu, Osami Sakata, Takahisa Shiraishi, Shogo Nakamura, Takanori Kiguci, Akihiro Akama, Toyohiko J. Kono, Hiroshi Uchida, Hiroshi Funakubo. Orientation control and domain structure analysis of {100}-oriented epitaxial ferroelectric orthorhombic HfO2-based thin films, J. Appl. Phys., vol. 119, pp. 134101-1-7, Apr. 2016.
• Tomoaki Yamada, Daisuke Ito, Osami Sakata, Junki Kuroishi, Takahiro Namazu, Yasuhiko Imai, Takahisa Shiraishi, Takao Shimizu, Hiroshi Funakubo, Masahito Yoshino, Takanori Nagasaki. Domain structure of tetragonal Pb(Zr,Ti)O3 nanorods and its size dependence, Jpn. J. Appl. Phys., Vol. 54, pp. 10NA07-1-4, Sept. 2015.
• M. Hoffmann, U. Schroeder, T. Schenk, T. Shimizu, H. Funakubo, O. Sakata, D. Pohl, M. Drescher, C. Adelmann, R. Materlik, A. Kersch, T. Mikolajick. Stabilizing the ferroelectric phase in doped hafnium oxide, J. Appl. Phys., Vol. 118, pp. 072006-1-6, Aug. 2015.
• Tomoaki Yamada, Jun Yasumoto, Daisuke Ito, Osami Sakata, Yasuhiko Imai, Takanori Kiguchi, Takahisa Shiraishi, Takao Shimizu, Hiroshi Funakubo, Masahito Yoshino, Takanori Nagasaki. Negligible Substrate Clamping Effect on Piezoelectric Response in (111)-Epitaxial Tetragonal Pb(Ti, Zr)O3 Films, J. Appl. Phys., Vol. 118, pp. 072012-1-6, Aug. 2015.
• Daichi Ichinose, Takaaki Nakashima, Yoshitaka Ehara, Takahiro Oikawa, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Hiroshi Funakubo. Orientation control of epitaxial tetragonal Pb(ZrxTi1-x)O3 thin films grown on (100)KTaO3 substrates by tuning the Zr/(Zr+Ti) ratio, Appl. Phys. Lett., Vol. 107, pp. 022902-1-5, July 2015.
• Hsin-Hui Huang, Qi Zhang, Esther Huang, Ronald Maran, Osami Sakata, Yoshitaka Ehara, Takahisa Shiraishi, Hiroshi Funakubo, Paul Munroe, Nagarajan Valanoor. Epitaxial PbZrxTi1-xO3 ferroelectric bilayers with giant electromechanical properties, Advanced Materials Interfaces, Vol. 2, pp. 1500075-1-12, Apr. 2015.
• K. Yoshimatsu, K. Nogami, K. Watarai, K. Horiba, H. Kumigashira, O. Sakata, T. Oshima, A. Ohtomo. Synthesis and magnetic properties of double-perovskite oxide La₂MnFeO₆ thin films, Physics Review B, American Physical Society, Vol. 91, 5, 054421, Feb. 2015.  公式リンク  
  
• Takashi Fujisawa, Yoshitaka Ehara, Shintaro Yasui, Takafumi Kamo, Tomoaki Yamada, Osami Sakata, Hiroshi Funakubo. Direct Observation of Intrinsic Piezoelectricity of Pb(Zr,Ti)O₃ by Time-resolved X-ray Diffraction Measurement using Single-crystalline Films, Appl. Phys. Lett., vol. 105, No. 1, pp. 012905 1-5, July 2014.
• K. Nogami, K. Yoshimatsu, H. Mashiko, E. Sakai, H. Kumigashira, O. Sakata, T. Oshima, A. Ohtomo. Epitaxial synthesis and electronic properties of double-perovskite Sr₂TiRuO₆ films, Applied Physics Express, The Japan Society of Applied Physics, Volume 6, Number 10, 105502-1-4, Sept. 2013.  公式リンク  
  

国際会議発表 (査読有り)

• Sou Yasuhara, Yumi Yoshikawa, Takashi Teranishi, Osami Sakata, Shintaro Yasui, Tomoyasu Taniyama, Mitsuru Itoh. LiCoO2-BaTiO3-Electrolyte Interface After Electrochemical Treatment, STAC 11, July 2019.
• Tomoaki Yamada, Daisuke Ito, Tomas Sluka, Nava Setter, Osami Sakata, Takahiro Namazu, Hiroshi Funakubo, Masahito Yoshino, Takanori Nagasaki. Domain formation in Pb(Zr,Ti)O3 nanorods driven by depolarizing field, ICE2017(8th International Conference on Electroceramics), May 2017.
• Takanori Mimura, Kiriha Katayama, Takao Shimizu, Takanori Kiguchi, Akihiko Akama, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Stability of Ferroelectric Phase in Epitaxial HfO2-based Films, 2017 Joint IEEE ISAF-IWATMD-PFM Conference, May 2017.
• Tomoaki Yamada, D. Ito, T. Sluka, N. Setter, O. Sakata, T. Namazu, H. Funakubo, M. Yoshino, T. Nagasaki. Manipulation of Domain Structure in {100} Tetragonal Pb(Zr, Ti)O3 Nanorods by Charge Screening, 2017 Joint IEEE ISAF-IWATMD-PFM Conference, May 2017.

国内会議発表 (査読有り)

• 安原 颯, 茶島 圭介, 寺西 貴志, 勝矢 良雄, 坂田 修身, 安井 伸太郎, 谷山 智康, 伊藤 満. エピタキシャルBaTiO3/LiCoO2薄膜の界面状態と正極特性, 第77回応用物理学会秋季学術講演会.

国際会議発表 (査読なし・不明)

• Hiroshi Funakubo, Daichi Ichinose, Yoshitaka Ehara, Takao Shimizu, Osami Sakata, Tomoaki Yamada. Domain structure change by applying an electric field in dominantly in-plane-polarized (100)/(001)-oriented tetragonal Pb(Zr,Ti)O3 films, ISFD-15 (15th International Symposium on Ferroic Domains & Micro- to Nano-scopic Structures), Aug. 2022.
• Shimizu, T., Tashiro Y., Takanori M., Shiraishi T., Kiguchi T., Konno T. J., Sakata O., Funakubo H.. Field-Induced Structural Change in HfO2-Based Ferroelectric Materials, E-MRS (2021 Fall Meeting of the European Materials Research Society), Sept. 2021.
• Takao Shimizu, Takanori Mimura, Yuki Tashiro, Takanori Kiguchi, Takahisa Shiraishi, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Field-induced structural change in HfO2-based ferroelectric materials, 2021 ISAF-ISIF-PFM Joint Conference, May 2021.
• Shimizu, T., Mimura, T., Tashiro, Y., Sakata, O., Funakubo, H. Phase transition in HfO2 ferroelectric materials investigated by XRD study, E-MRS (2021 Spring Meeting of the European Materials Research Society), May 2021.
• Takao Shimizu, Takanori Mimura, Yuki Tashiro, Takahisa Shiraishi, Takanori Kiguchi, Toyohiko J. Konno, Osami Sakata, Yoshio Katsuya, Hiroshi Funakubo. Structure Change in the HfO2 Ferroelectric Materials Induced by an Electric Field, ICC8 (8th International Congress on Ceramics), Apr. 2021.
• Takao Shimizu, Yoshitaka Ehara, Takanori Mimura, Shintaro Yasui, Tomoaki Yamada, Yasuhiko Imai, Yoshio Katsuya, Osami Sakata, Hiroshi Funakubo. The Domain Switching in Rhombohedral PZT Observed by In Situ X-Ray Diffraction Study by Various Frequencies, 2019 MRS Fall Meeting & Exhibi, Dec. 2019.
• Takanori Mimura, Takao Shimizu, Yoshio Katsuya, Osami Sakata, Hiroshi Funakubo. Stability of Ferroelectric Orthorhombic Phase in Epitaxial HfO2-based Films, 19th US-Japan Seminar on Dielectric and Piezoelectric Ceramics, Nov. 2019.
• T. Mimura, T. Shimizu, Y. Katsuya, O. Sakata, H. Funakubo. Thickness- and orientationdependence of Curie temperature of ferroelectric epitaxial HfO2 based films, SSDM 2019 (2019 International Conference on Solid State Devices and Materials), Sept. 2019.
• Kohei Yoshimatsu, Osami Sakata, Akira Ohtomo. Superconductivity in higher titanates of γ-Ti3O5 and Ti4O7 films, Sept. 2019.
• Takanori Mimura, Takao Shimizu, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Yoshio Katsuya, Osami Sakata, Hiroshi Funakubo. Effects of heat treatment and in situ high temperature XRD study on the formation of ferroelectric epitaxial HfO2 based film, SSDM 2018 (2018 International Conference on Solid State Devices and Materials), Sept. 2018.
• T. Yamada, D. Ito, T. Sluka, O. Sakata, H. Funakubo, T. Namazu, M. Yoshino, N. Setter, T. Nagasaki. Charge Screening Strategy for Controlling Domain Structure and Piezoelectric Property in Ferroelectric Nano-Rods, IFAAP 2018 (2018 ISAF-FMA-AMF-AMEC-PFM Joint Conference), May 2018.
• T. Mimura, T. Shimizu, T. Kiguchi, A. Akama, T. J. Konno, Y. Katsuya, O. Sakata, H. Funakubo. Temperature Stability of Ferroelectric Phase of Epitaxial Y-doped HfO2 Films, IFAAP 2018 (2018 ISAF-FMA-AMF-AMEC-PFM Joint Conference), May 2018.
• T. Shimizu, T. Mimura, T. Kiguchi, T. Shiraishi, A. Akama, T. J. Konno, O. Sakata, K. Yoshio, H. Funakubo. Domain switching in epitaxial ferroelectric HfO2 films, 2018 Conference on Electronic and Advanced Materials, Jan. 2018.
• T. Shimizu, N. Oshima, T. Sato, D. Ichinose, T. Yamada, O. Sakata, H. Funakubo. Direct and qualitative characterization of the 90° domain switching under applying electric field in tetragonal Pb(Zr, Ti)O3 film, 2018 PiezoMEMS Workshop, Jan. 2018.
• Daichi Ichinose, Yoshitaka Ehara, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Hiroshi Funakubo. Domain structure change by applying electric field of dominantly in-plane-polarized (100)/(001)-oriented tetragonal Pb(Zr, Ti)O3 thin film, 18th US-Japan Seminar on Dielectric and Piezoelectric Materials, Nov. 2017.
• Tomoaki Yamada, Daisuke Ito, Tomas Sluka, Osami Sakata, Hiroshi Funakubo, Takahiro Namazu, Masahito Yoshino, Takanori Nagasaki, Nava Setter. Domain pattern control in Pb(Zr, Ti)O3 nanorods via charge screening strategy, 18th US-Japan Seminar on Dielectric and Piezoelectric Materials, Nov. 2017.
• Tomoya Sato, Daichi Ichinose, Naoya Oshima, Takanori Mimura, Yuichi Nemoto, Takao Shimizu, Yasuhiko Imai, Hiroshi Uchida, Osami Sakata, Hiroshi Funakubo. Time Response of Crystal Structure in Tetragonal Pb(Zr,Ti)O3 Films Under an Applied Electric Field, STAC-10 (The Tenth International Conference on the Science and Technology for Advanced Ceramics), Aug. 2017.
• Takanori Mimura, Kiriha Katayama, Takao Shimizu, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Thickness-dependent phase stability of epitaxial ferroelectric HfO2-based films, STAC-10 (The Tenth International Conference on the Science and Technology for Advanced Ceramics), Aug. 2017.
• Daichi Ichinose, Yoshitaka Ehara, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Alexei. Gruverman, Hiroshi Funakubo. Domain structure change by applying electric field of dominantly in-plane-polarized Pb(Zr,Ti)O3 thin film, STAC-10 (The Tenth International Conference on the Science and Technology for Advanced Ceramics), Aug. 2017.
• K. Yoshimatsu, O.Sakata, A.ohtomo. Superconductivity in higher titanium oxides, 3rd Functional Oxide Thin Films for Advanced Energy and Information Technology Conference, July 2017.  公式リンク  
  
• Hiroshi Funakubo, Daichi Ichinose, Tomoya Sato, Takao Shimizu, Osami Sakata, Tomoaki Yamada. Domain Structure propagation of tensile-strained {100}-oriented epitaxial tetragonal Pb(Zr, Ti)O3 films, PACRIM 12 (12th Pacific Rim Conference on Ceramic and Glass Technology), May 2017.
• Hiroshi Funakubo, Takao Shimizu, Kiliha Katayama, Takanori Mimura, Takanori Kiguchi, Takahisa Shiraishi, Akihiro Akama, Toyohiko J. Konno, Osami Sakata. Phase stability and Property design in HfO2-based ferroelectric thin films, ICE 2017 (8th International Conference on Electroceramics), May 2017.
• Y. Ebihara, T. Yamada, O. Sakata, T. Kiguchi, H. Morioka, T. Shimizu, H. Funakubo, T. J. Konno, M. Yoshino, T. Nagasaki. Structural and piezoelectric properties in (111) tetragonal/rhombohedral Pb(Zr,Ti)O3 artificial superlattice thin films, AMEC 2016 (The 10th Asian Meeting on Electroceramics), Dec. 2016.
• T. Yamada, D. Ito, T. Sluka, N. Setter, O. Sakata, T. Namazu, H. Funakubo, M. Yoshino, T. Nagasaki. Domain Pattern Control in Pb(Zr,Ti)O3 Nanorods by Charge Screening, AMEC 2016 (The 10th Asian Meeting on Electroceramics), Dec. 2016.
• Takao Shimizu, Kiliha Katayama, Takanori Mimura, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Epitaxial Growth of Ferroelectric HfO2-based films, ICTAM-AFM10 (International Conference on Technologically Advanced Materials & Asian Meeting on Ferroelectricity), Nov. 2016.
• Hiroshi Funakubo, Takanori Mimura, Takao Shimizu, Kiliha Katayama, Hiroshi Uchida, Takanori Kiguchi, Akihiro Akama, Toyohiko Konno, Osami Sakata. Orientation Controlled HfO2-Based Ferroelectric Films Prepared by Solid Phase Local Epitaxial Technique for High Density Memory Applications, 2016 MRS Fall Meeting & Exhibit, Nov. 2016.
• Hiroshi Funakubo, Daichi Ichinose, Tomoya Sato, Takao Shimizu, Osami Sakata, Tomoaki Yamada. Domain structure of tensile and compressive strainesd epitaxial Pb(Zr,Ti)O3 films with {100} orientation, 2016 ISFD-13 Conference, Oct. 2016.
• Takao Shimizu, Kiliha Katayama, Takanori Mimura, Takanori Kiguchi, Takahisa Shiraishi, Akihiro Akama, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Ferroelectricity in epitaxial and well-oriented texutured Y-doped HfO2 films, KJCFE 11th (11th Korea-Japan Conference on Ferroelectrics), Aug. 2016.
• Hiroshi Funakubo, Takao Shimizu, Kiliha Katayama, Takanori Kiguchi, Akihiro Akama, Toyohiko J Konno, Osami Sakata. Fundamental Understanding of Ferroelectricity in HfO2-based Ferroelectrics, ISAF/ECAPD/PFM 2016, Aug. 2016.
• Hiroshi Funakubo, Daichi Ichinose, Takaaki Nakashima, Yoshitaka Ehara, Takao Shimizu, Osami Sakata, Tomoaki Yamada. Domain Formation of Epitaxial Tetragonal Pb(Zr, Ti)O3 Thin Films Grown Under Tensile Strain, TOPO 2016, Aug. 2016.
• Tomoaki Yamada, Daisuke Ito, Osami Sakata, Hiroshi Funakubo, Takahiro Namazu, Masahito Yoshino, Takanori Nagasaki. Manipulation of Domain Structure in Pb(Zr,Ti)O3 Nanorods by Charge Screening, KJCFE 11th (11th Korea-Japan Conference on Ferroelectrics), Aug. 2016.
• Daichi Ichinose, Takaaki Nakashima, Yoshitaka Ehara, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Hiroshi Funakubo. Formation process of epitaxial tetragonal Pb(Zr, Ti)O3 thin film, ISAF/ECAPD/PFM 2016 (2016 Joint IEEE International Symposium on the Applications of Ferroelectrics, European Conference on Applications of Polar Dielectrics & Workshop on Piezoresponse Force Microscopy), Aug. 2016.
• Takanori Mimura, Kiriha Katayama, Takao Shimizu, Hiroshi Uchida, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Growth of orientation-controlled ferroelectric HfO2 thin films by solid phase crystallization and their characterization, 2016 Joint RCBJSF-IWRF Conference, June 2016.
• Takao Shimizu, Kiliha Katayama, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Preparation of fluorite-structured ferroelectric thin films and their characterization, 2016 Joint RCBJSF-IWRF Conference, June 2016.
• Hiroshi Funakubo, Takanori Mimura, Kiriha Katayama, Takao Shimizu, Hiroshi Uchida, Takanori Kiguchi, Akihiro Akama, Toyohiko Konno, Osami Sakata. Growth of Orientation-Controlled Ferroelectric HfO2 Thin Films for Next Generation Ferroelectric Devices, ISCSI-Ⅶ/ISTDM 2016, June 2016.
• Tomoaki Yamada, Daisuke Ito, Osami Sakata, Takanori Kiguchi, Takahisa Shiraishi, Takao Shimizu, MasahitoYoshino, Hiroshi Funakubo, Takanori Nagasaki. Domain structure and piezoelectric response of self-assembled tetragonal Pb(Zr,Ti)O3 Nanorods, Pacifichem 2015, Dec. 2015.
• T. Yamada, D. Ito, O. Sakata, T. Kiguchi, T. Shiraishi, T. Shimizu, H. Funakubo, M. Yoshino, T. Nagasaki. Size Dependence of Domain Structure in Tetragonal Pb(Zr,Ti)O3 Nanorods, 17th US-Japan Seminar on Dielectric and Piezoelectric Ceramics, Nov. 2015.
• Kiliha Katayama, Takao Shimizu, Osami Sakata, Takanori Kiguchi, Akihiro Akama, Toyohiko J. Konno, Syogo Nakamura, Hiroshi Uchida, Hiroshi Funakubo. Growth and Structural Analysis of Epitaxial Orthorhombic YO1.5-HfO2 Thin Films, 17th US-Japan Seminar on Dielectric and Piezoelectric Ceramics, Nov. 2015.
• Takao Shimizu, Kiliha Katayama, Takanori Kiguchi, Akihiro Akama, Shougo Nakamura, Takahisa Shiraishi, Toyohiko J. Konno, Osami Sakata, Hiroshi Funakubo. Growth of Epitaxial Orthorhombic YO1.5-Substituted HfO2 Thin Film, 17th US-Japan Seminar on Dielectric and Piezoelectric Ceramics, Nov. 2015.
• Daichi Ichinose, Takaaki Nakashima, Yoshitaka Ehara, Takahiro Oikawa, Takao Shimizu, Osami Sakata, Tomoaki Yamada, Hiroshi Funakubo. Orientation Control of Epitaxial Tetragonal Pb(Zr, Ti)O3 Thin Films Grown on (100)KTaO3 Substrates by Tuning the Zr/(Zr+Ti) Ratio, 17th US-Japan Seminar on Dielectric and Piezoelectric Ceramics, Nov. 2015.
• T. Yamada, D. Ito, O. Sakata, H. Funakubo, M. Yoshino, T. Nagasaki. Domain Structure and Piezoelectric Response in One-dimensional PZT Nanostructure, IUMRS-ICAM 2015, Oct. 2015.
• K. Katayama, T. Shimizu, O. Sakata, T. Kiguchi, A. Akama, T. J. Konno, S. Nakamura, H. Uchida, H. Funakubo. Growth and structural analysis of epitaxial orthorhombic YO1.5-HfO2 thin films, NIMS Conference 2015, July 2015.
• T. Yamada, D. Ito, O. Sakata, J. Yasumoto, T. Shiraishi, T. Shimizu, M. Yoshino, H. Funakubo, T. Nagasaki. Domain Structure and Piezoelectric Response in Epitaxial PZT 1D-Nanorods and 2D-Thin Films, EM-NANO 2015, June 2015.
• Tomoaki YAMADA, Jun YASUMOTO, Daisuke ITO, Osami SAKATA, Takanori KIGUCHI, Hidenori TANAKA, Yoshitaka EHARA, Shintaro YASUI, Takahiro OIKAWA, Hiroshi FUNAKUBO, Masahito YOSHINO, Takanori NAGASAKI. Piezoelectric Response in Epitaxial PZT 1D-Nanorods and 2D-Thin Films, ISAF-ISIF-PFM 2015, May 2015.
• Daisuke ITO, Tomoaki YAMADA, Osami SAKATA, Junki KUROISHI, Takahiro NAMAZU, Takahisa SHIRAISHI, Takao SHIMIZU, Hiroshi FUNAKUBO, Masahito YOSHINO, Takanori NAGASAKI. Fabrication of Tetragonal Pb(Zr,Ti)O3 Nanorods by Focused Ion Beam and Characterization of the Domain Structure, ISAF-ISIF-PFM 2015, May 2015.
• K. Yoshimatsu, K. Nogami, K. Watarai, H. Mashiko, E. Sakai, H. Kumigashira, O. Sakata, T. Oshima, A. Ohtomo. Synthesis and spectroscopic study on double-perovskite oxide thin films, 2014 Energy Materials Nanotechnology Open Access week, Sept. 2014.  公式リンク  
  
• K. Nogami, H. Mashiko, K. Yoshimatsu, E. Sakai, H. Kumigashira, O. Sakata, T. Oshima, A. Ohtomo. Epitaxial synthesis and electronic properties of double-perovskite Sr₂TiRuO₆, The Seventh International Conference on the Science and Technology for Advanced Ceramics (STAC-7), June 2013.  公式リンク  
  

国内会議発表 (査読なし・不明)

• 張 樹桐, サフーラムチャンドラ, 相馬 拓人, 北村 未歩, 堀場 弘司, 組頭 広志, 坂田 修身, 大友 明. ダブルペロブスカイト型 La2MnCoO6薄膜のBアンチサイト欠陥の制御と交換バイアスの観測, 第82回応用物理学会秋季学術講演会, Sept. 2021.
• 武内 優, 坂田 修身, 大友 明. ペロブスカイト型La2FeCoO6人工超格子薄膜の作製, 応用物理学会秋季学術講演会, Sept. 2020.
• 野口 裕太郎, 相馬 拓人, 吉松 公平, 坂田 修身, 大友 明. 金属酸化物人工超格子を前駆体に用いた規則合金薄膜への転換法の検討, 応用物理学会春季学術, Mar. 2020.
• T. Shimizu, T. Mimura, T. Kiguchi, A. Akama, T. J. Konno, Y. Katsuya, O. Sakata, H. Funakubo. Domain Structure and Electric Field Induced Domain Switching in HfO2 Ferroelectrics, IFAAP 2018 (2018 ISAF-FMA-AMF-AMEC-PFM Joint Conference), May 2018.
• 吉松 公平, 坂田 修身, 大友 明. 高品質γ-Ti₃O₅薄膜の合成と超伝導特性, 第63回応用物理学会春季学術講演会, Mar. 2016.  公式リンク  
  
• 片山 きりは, 清水 荘雄, 木口 賢紀, 赤間 章裕, 今野 豊彦, 内田 寛, 坂田 修身, 舟窪 浩. Si基板上への斜方晶エピタキシャルHfO2基薄膜の作製, 第76回応用物理学会秋季学術講演会, Sept. 2015.
• 山田 智明, 伊藤 大介, 坂田 修身, 黒石 隼輝, 生津 資大, 清水 荘雄, 舟窪 浩, 吉野 正人, 長崎 正雅. {100}, {111}配向Pb(Zr,Ti)O3ナノロッドのドメイン構造とそのサイズ依存性, 第76回応用物理学会秋季学術講演会, Sept. 2015.
• 一ノ瀬 大地, 中島 崇明, 江原 祥隆, 清水 荘雄, 坂田 修身, 山田 智明, 舟窪 浩. 正方晶Pb(Zr,Ti)O3薄膜におけるZr/(Zr+Ti)比のドメイン構造への影響, 第76回応用物理学会秋季学術講演会, Sept. 2015.
• 清水 荘雄, 片山 きりは, 木口 賢紀, 赤間 章裕, 今野 豊彦, 内田 寛, 坂田 修身, 舟窪 浩. 斜方晶エピタキシャルHfO2基薄膜のドメイン構造, 第76回応用物理学会秋季学術講演会, Sept. 2015.
• 吉松 公平, 坂田 修身, 大友 明. γ-Ti₃O₅ 薄膜の超伝導, 第76回応用物理学会秋季学術講演会, Sept. 2015.  公式リンク  
  
• 吉松 公平, 坂田 修身, 大友 明. マグネリ相Ti酸化物薄膜の超伝導, 第76回応用物理学会秋季学術講演会, Sept. 2015.  公式リンク  
  
• 大島 孝仁, 増子 尚徳, 野上 顕悟, 吉松 公平, 坂井 延寿, 組頭 広志, 坂田 修身, 大友 明. 遷移金属酸化物の電子構造制御による光エネルギー変換材料への展開, ISSPセミナー（Polar oxides for energy conversion）, June 2013.  公式リンク  
  

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