Oka Kengo 岡研吾

Researcher Number	80602044
Other IDs
Affiliation (Current)	2025: 近畿大学, 理工学部, 准教授
Affiliation (based on the past Project Information) *help	2019 – 2024: 近畿大学, 理工学部, 講師 2014 – 2018: 中央大学, 理工学部, 助教
Review Section/Research Field	Principal Investigator Science and Engineering / Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related / Basic Section 26020:Inorganic materials and properties-related / Inorganic chemistry / Condensed matter physics II Except Principal Investigator Inorganic materials/Physical properties
Keywords	Principal Investigator 複合アニオン化合物 / 酸フッ化物 / 精密構造解析 / リートベルト解析 / ビスマス / 鉛 / 複合アニオン / フッ化物イオン伝導 / 誘電体物性 / アパタイト … More / 層状ペロブスカイト / 負熱膨張 / アニオン秩序配列 / アニオン複合化物 / ペロブスカイト / 負熱膨張材料 / トポタクティックな反応 / 構造相転移 / 層状化合物 / イオン伝導 / フッ化物イオン / 層状構造 / フッ化物イオン伝導体 / スピン再配向 / イオン伝導性 / 磁性 / 構造解析 / セラミックス / パイロクロア / 可視光応答光触媒 / 無機工業化学 / 誘電材料 / トポタクティック / アニオン複合化 / 構造物性 / 固体化学 / 放射光粉末X線回折 … More Except Principal Investigator 中性子回折 / 硬Ｘ線光電子分光 / 放射光Ｘ線 / バレンススキッパー / 遷移金属酸化物 / 硬X線光電子分光 / 放射光X線 / 電荷分布 / 電荷秩序 / ペロブスカイト / 精密構造解析 / 強誘電転移 / 電荷移動 / 負熱膨張 Less

アニオン組成制御による負熱膨張材料の開発と物質設計指針の確立Principal Investigator
- Principal Investigator
  
  岡研吾
- Project Period (FY)
  2024 – 2026
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
- Research Institution
  Kindai University
Exploration of novel fluoride anion conductors with rigid frameworksPrincipal Investigator
- Principal Investigator
  
  Oka Kengo
- Project Period (FY)
  2021 – 2023
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Review Section
  
  Basic Section 26020:Inorganic materials and properties-related
- Research Institution
  Kindai University
Pb,Biを含む酸フッ化物における特異的な物性の開拓と起源の解明Principal Investigator
- Principal Investigator
  
  岡研吾
- Project Period (FY)
  2019 – 2020
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Review Section
  
  Science and Engineering
- Research Institution
  Kindai University
簡便かつ安価な合成法を用いた新規Pb,Bi含有酸フッ化物の物質探索Principal Investigator
- Principal Investigator
  
  岡研吾
- Project Period (FY)
  2017 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
- Review Section
  
  Science and Engineering
- Research Institution
  Chuo University
Clarification of s-d interorbital charge distribution change in Bi and Pb-perovskites and the application to giant negative thermal expansion materials
- Principal Investigator
  
  Masaki Azuma
- Project Period (FY)
  2016 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (A)
- Research Field
  
  Inorganic materials/Physical properties
- Research Institution
  Tokyo Institute of Technology
Investigation of the anion order in Pb/Bi containing mixed anion compoundsPrincipal Investigator
- Principal Investigator
  
  Oka Kengo
- Project Period (FY)
  2016 – 2019
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Inorganic chemistry
- Research Institution
  Kindai University
  Chuo University
Investigation of the exotic properties originated from a large tetragonal distrotionPrincipal Investigator
- Principal Investigator
  
  Oka Kengo
- Project Period (FY)
  2014 – 2015
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Condensed matter physics II
- Research Institution
  Chuo University

All 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 Other

All Journal Article Presentation

[Journal Article] Anionic order in Pb2Ti4O9F2 Revisited by nuclear magnetic resonance and density functional theory2022
- Author(s)
  Oka Kengo、Ichibha Tom、Kato Daichi、Noda Yasuto、Tominaga Yusuke、Yamada Kosei、Iwasaki Mitsunobu、Noma Naoki、Hongo Kenta、Maezono Ryo、Reboredo Fernando A.
- Journal Title
  
  Dalton Transactions
  
  Volume: 51 Issue: 40 Pages: 15361-15369
- DOI
  10.1039/d2dt00839d
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21K03400, KAKENHI-PROJECT-21K04659, KAKENHI-PLANNED-22H05146
[Journal Article] Negative Thermal Expansion in Fluoroapatite Pb5(VO4)3F Enhanced by the Steric Effect of Pb2+2022
- Author(s)
 Oka Kengo、Takasu Miho、Nishiki Wataru、Nishikubo Takumi、Azuma Masaki、Noma Naoki、Iwasaki Mitsunobu
- Journal Title
 
 Inorganic Chemistry
 
 Volume: 61 Issue: 32 Pages: 12552-12558
- DOI
 10.1021/acs.inorgchem.2c01300
- Peer Reviewed
- Data Source
 KAKENHI-PROJECT-21K04659, KAKENHI-PROJECT-19H05625
[Journal Article] Site preference of fluoride anion and potential ionic conductivity in fluorapatites A5(VO4)3F (A = Pb, Sr, and Ba)2022
- Author(s)
 OKA Kengo、NISHIKI Wataru、TAKASU Miho、NOMA Naoki、IWASAKI Mitsunobu
- Journal Title
 
 J. Ceram. Soc. Japan
 
 Volume: 130 Issue: 1 Pages: 35-38
- DOI
 10.2109/jcersj2.21092
- NAID
 130008139169
- ISSN
 1348-6535, 1882-0743
- Year and Date
 2022-01-01
- Language
 English
- Peer Reviewed
- Data Source
 KAKENHI-PROJECT-21K04659
[Journal Article] Exploring novel functional properties arose from anion order in mixed anion compounds2021
- Author(s)
  OKA Kengo
- Journal Title
  
  J. Ceram. Soc. Japan
  
  Volume: 129 Issue: 9 Pages: 555-560
- DOI
  10.2109/jcersj2.21070
- NAID
  130008082630
- ISSN
  1348-6535, 1882-0743
- Year and Date
  2021-09-01
- Language
  English
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-21K04659
[Journal Article] Light Absorption Properties and Electronic Band Structures of Lead‐Vanadium Oxyhalide Apatites Pb5(VO4)3X (X=F, Cl, Br, I)2020
- Author(s)
  Masashi Nakamura, Kenji Oqmhula, Keishu Utimula, Miharu Eguchi, Kengo Oka, Kenta Hongo, Ryo Maezono, Kazuhiko Maeda*
- Journal Title
  
  Chem Asian J.
  
  Volume: 15 Issue: 4 Pages: 540-545
- DOI
  10.1002/asia.201901692
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PLANNED-16H06439, KAKENHI-PUBLICLY-19H04692, KAKENHI-PUBLICLY-19H04706, KAKENHI-PROJECT-16K05731, KAKENHI-PROJECT-19K05029, KAKENHI-PLANNED-16H06441, KAKENHI-PUBLICLY-19H05169
[Journal Article] Oxyfluoride Pb2Ti4O9F2 as a Stable Anode Material for Photoelectrochemical Water Oxidation2020
- Author(s)
  K. Maeda, N. Hirayama, H. Nakata, H. Wakayama, and K. Oka
- Journal Title
  
  The Journal of Physical Chemistry C
  
  Volume: 124 Issue: 3 Pages: 1844-1850
- DOI
  10.1021/acs.jpcc.9b09969
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-16H06439, KAKENHI-PUBLICLY-19H04706, KAKENHI-PROJECT-16K05731, KAKENHI-PLANNED-16H06441
[Journal Article] Activation of a Pt-loaded Pb2Ti2O5.4F1.2 photocatalyst by alkaline chloride treatment for improved H2 evolution under visible light2020
- Author(s)
  Haruki Wakayama, Kosaku Kato, Kodai Kashihara, Tomoki Uchiyama, Akinobu Miyoshi, Hiroko Nakata, Daling Lu, Kengo Oka, Akira Yamakata, Yoshiharu Uchimoto and Kazuhiko Maeda
- Journal Title
  
  Journal of Materials Chemistry A
  
  Volume: - Issue: 18 Pages: 9099-9108
- DOI
  10.1039/d0ta02883e
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-17H05491, KAKENHI-PUBLICLY-19H04708, KAKENHI-PLANNED-16H06441, KAKENHI-PUBLICLY-19H04706, KAKENHI-PROJECT-19J22433, KAKENHI-PLANNED-20H05838, KAKENHI-PROJECT-19H02820
[Journal Article] Negative Thermal Expansion in Lead-Free La-Substituted Bi0.5Na0.5VO32020
- Author(s)
  Ishizaki Hayato、Sakai Yuki、Nishikubo Takumi、Pan Zhao、Oka Kengo、Yamamoto Hajime、Azuma Masaki
- Journal Title
  
  Chemistry of Materials
  
  Volume: 32 Issue: 11 Pages: 4832-4837
- DOI
  10.1021/acs.chemmater.0c01709
- Peer Reviewed
- Data Source
  KAKENHI-PUBLICLY-19H04706, KAKENHI-PROJECT-18H05208, KAKENHI-PROJECT-19H05625
[Journal Article] Enhanced Negative Thermal Expansion Induced by Simultaneous Charge Transfer and Polar-Nonpolar Transitions2019
- Author(s)
  Takumi Nishikubo, Yuki Sakai, Kengo Oka, Tetsu Watanuki, Akihiko Machida, Masaichiro Mizumaki, Koki Maebayashi, Takashi Imai, Takahiro Ogata, Keisuke Yokoyama, Yoichi Okimoto, Shin-ya Koshihara, Hajime Hojo, Takashi Mizokawa and Masaki Azuma
- Journal Title
  
  J. Am. Chem. Soc.
  
  Volume: 141 Issue: 49 Pages: 19397-19403
- DOI
  10.1021/jacs.9b10336
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-18H05208, KAKENHI-PROJECT-19H05625, KAKENHI-PROJECT-17H04952, KAKENHI-PROJECT-16K05731
[Journal Article] Solar-Driven Photoelectrochemical Water Oxidation over an n-Type Lead Titanium Oxyfluoride Anode2019
- Author(s)
  N. Hirayama, H. Nakata, H. Wakayama, S. Nishioka, T. Kanazawa, R. Kamata, Y. Ebato, K. Kato, H. Kumagai, A. Yamakata, K. Oka, and K. Maeda
- Journal Title
  
  Journal of the American Chemical Society
  
  Volume: 141 Issue: 43 Pages: 17158-17165
- DOI
  10.1021/jacs.9b06570
- Peer Reviewed
- Data Source
  KAKENHI-PLANNED-16H06439, KAKENHI-PLANNED-16H06441, KAKENHI-PUBLICLY-19H04706, KAKENHI-PUBLICLY-17H05491, KAKENHI-PUBLICLY-19H04708, KAKENHI-PROJECT-19H02820
[Journal Article] Negative thermal expansion in electron doped PbVO3-xFx2019
- Author(s)
  Ogata Takahiro、Oka Kengo、Azuma Masaki
- Journal Title
  
  Applied Physics Express
  
  Volume: 12 Issue: 2 Pages: 023005-023005
- DOI
  10.7567/1882-0786/aafb9b
- NAID
  210000135584
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K05731, KAKENHI-PROJECT-18H05208, KAKENHI-PLANNED-16H06439, KAKENHI-PUBLICLY-17H05489, KAKENHI-PROJECT-16H02393
[Journal Article] Synthesis, Crystal Structure, and Optical Properties of Layered Perovskite Scandium Oxychlorides: Sr2ScO3Cl, Sr3Sc2O5Cl2, and Ba3Sc2O5Cl22018
- Author(s)
  Su Yu、Tsujimoto Yoshihiro、Fujii Kotaro、Tatsuta Makoto、Oka Kengo、Yashima Masatomo、Ogino Hiraku、Yamaura Kazunari
- Journal Title
  
  Inorganic Chemistry
  
  Volume: 57 Issue: 9 Pages: 5615-5623
- DOI
  10.1021/acs.inorgchem.8b00573
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-ORGANIZER-16H06438, KAKENHI-PUBLICLY-17H05493, KAKENHI-PROJECT-15H02291, KAKENHI-PROJECT-16K05731, KAKENHI-PLANNED-16H06439, KAKENHI-PLANNED-16H06440, KAKENHI-PUBLICLY-17H05489, KAKENHI-PROJECT-16H04501, KAKENHI-PROJECT-20K20293
[Journal Article] Light Absorption Properties and Electronic Band Structures of Lead Titanium Oxyfluoride Photocatalysts Pb2Ti4O9F2 and Pb2Ti2O5.4F1.22018
- Author(s)
  Wakayama Haruki、Utimula Keishu、Ichibha Tom、Kuriki Ryo、Hongo Kenta、Maezono Ryo、Oka Kengo、Maeda Kazuhiko
- Journal Title
  
  The Journal of Physical Chemistry C
  
  Volume: 122 Issue: 46 Pages: 26506-26511
- DOI
  10.1021/acs.jpcc.8b08953
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K05731, KAKENHI-PROJECT-17K17762, KAKENHI-PLANNED-16H06439, KAKENHI-PLANNED-16H06441, KAKENHI-PUBLICLY-17H05478, KAKENHI-PUBLICLY-17H05489, KAKENHI-PROJECT-16H02393, KAKENHI-PROJECT-18J12653
[Journal Article] A Stable, Narrow-Gap Oxyfluoride Photocatalyst for Visible-Light Hydrogen Evolution and Carbon Dioxide Reduction2018
- Author(s)
  Kuriki Ryo、Ichibha Tom、Hongo Kenta、Lu Daling、Maezono Ryo、Kageyama Hiroshi、Ishitani Osamu、Oka Kengo、Maeda Kazuhiko
- Journal Title
  
  Journal of the American Chemical Society
  
  Volume: 140 Issue: 21 Pages: 6648-6655
- DOI
  10.1021/jacs.8b02822
- Peer Reviewed / Open Access / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K05731, KAKENHI-PROJECT-17K17762, KAKENHI-ORGANIZER-16H06438, KAKENHI-PLANNED-16H06439, KAKENHI-PLANNED-16H06441, KAKENHI-PUBLICLY-17H05478, KAKENHI-PUBLICLY-17H05489, KAKENHI-PROJECT-17J03705
[Journal Article] Incorporation of sulfur ions into La2-xSrxCuO4 superconducting cuprate2018
- Author(s)
  Oka Kengo、Shirota Kensuke、Sato Yoshiki、Oh-ishi Katsuyoshi
- Journal Title
  
  Journal of Asian Ceramic Societies
  
  Volume: 6 Issue: 3 Pages: 284-288
- DOI
  10.1080/21870764.2018.1507611
- Peer Reviewed / Open Access
- Data Source
  KAKENHI-PROJECT-16K05731, KAKENHI-PLANNED-16H06439, KAKENHI-PUBLICLY-17H05489
[Journal Article] Experimental and Theoretical Studies of the Metallic Conductivity in Cubic PbVO3 under High Pressure2018
- Author(s)
  Oka Kengo、Yamauchi Touru、Kanungo Sudipta、Shimazu Taku、Oh-ishi Katsuyohi、Uwatoko Yoshiya、Azuma Masaki、Saha-Dasgupta Tanusri
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 87 Issue: 2 Pages: 024801-024801
- DOI
  10.7566/jpsj.87.024801
- NAID
  210000134709
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K05731, KAKENHI-PROJECT-17K05531, KAKENHI-PROJECT-16H02393, KAKENHI-PROJECT-16H04019
[Journal Article] Development of Bismuth Ferrite as a Piezoelectric and Multiferroic Material by Cobalt Substitution2018
- Author(s)
  Hojo Hajime、Oka Kengo、Shimizu Keisuke、Yamamoto Hajime、Kawabe Ryo、Azuma Masaki
- Journal Title
  
  Advanced Materials
  
  Volume: 30 Issue: 33 Pages: 1705665-1705665
- DOI
  10.1002/adma.201705665
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16H02393
[Journal Article] Optimized negative thermal expansion induced by gradual intermetallic charge transfer in Bi1-xSbxNiO32018
- Author(s)
  Nishikubo Takumi、Sakai Yuki、Oka Kengo、Mizumaki Masaichiro、Watanuki Tetsu、Machida Akihiko、Maejima Naoyuki、Ueda Shigenori、Mizokawa Takashi、Azuma Masaki
- Journal Title
  
  Applied Physics Express
  
  Volume: 11 Issue: 6 Pages: 061102-061102
- DOI
  10.7567/apex.11.061102
- NAID
  210000136216
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K05731, KAKENHI-PUBLICLY-17H05489, KAKENHI-PROJECT-16H02393
[Journal Article] Systematic charge distribution changes in Bi- and Pb-3d transition metal perovskites2018
- Author(s)
  Azuma Masaki、Sakai Yuki、Nishikubo Takumi、Mizumaki Masaichiro、Watanuki Tetsu、Mizokawa Takashi、Oka Kengo、Hojo Hajime、Naka Makoto
- Journal Title
  
  Dalton Transactions
  
  Volume: 47 Issue: 5 Pages: 1371-1377
- DOI
  10.1039/c7dt03244g
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K17731, KAKENHI-PUBLICLY-16H00883, KAKENHI-PROJECT-16H02393
[Journal Article] Glassy Distribution of Bi3+/Bi5+ in Bi1－xPbxNiO3 and Negative Thermal Expansion Induced by Intermetallic Charge Transfer2016
- Author(s)
  Kiho Nakano, Kengo Oka, Tetsu Watanuki, Masaichiro Mizumaki, Akihiko Machida, Akane Agui, Hyunjeong Kim, Jun Komiyama, Takashi Mizokawa, Takumi Nishikubo, Yuichiro Hattori, Shigenori Ueda, Yuki Sakai, and Masaki Azuma
- Journal Title
  
  Chemistry of Materials
  
  Volume: 28 Issue: 17 Pages: 6062-6067
- DOI
  10.1021/acs.chemmater.6b01160
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-16H02393, KAKENHI-PROJECT-15K14119, KAKENHI-PROJECT-15K04658
[Journal Article] Temperature-Independent, Large Dielectric Constant Induced by Vacancy and Partial Anion Order in the Oxyfluoride Pyrochlore Pb2Ti2O6－δF2δ2016
- Author(s)
  Kengo Oka, Hajime Hojo, Masaki Azuma, and Katsuyoshi Oh-ishi
- Journal Title
  
  Chemistry of Materials
  
  Volume: 28 Issue: 15 Pages: 5554-5559
- DOI
  10.1021/acs.chemmater.6b02509
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-16K05731
[Journal Article] New PbTiO3 Type Giant Tetragonal Compound Bi2ZnVO6 and Its Stability under Pressure2015
- Author(s)
  Runze Yu, Hajime Hojo, Kengo Oka, Tetsu Watanuki, Akihiko Machida, Keisuke Shimizu, Kiho Nakano, and Masaki Azuma
- Journal Title
  
  Chemistry of Materials
  
  Volume: 27 Issue: 6 Pages: 2012-2017
- DOI
  10.1021/cm504133e
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PUBLICLY-26106507, KAKENHI-PROJECT-26800180
[Journal Article] Observation of anion order in Pb2Ti4O9F22015
- Author(s)
  K. Oka and K. Oh-ishi
- Journal Title
  
  Inorganic Chemistry
  
  Volume: 54 Issue: 21 Pages: 10239-10242
- DOI
  10.1021/acs.inorgchem.5b01496
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PROJECT-26800180
[Journal Article] Negative thermal expansion induced by intermetallic charge transfer2015
- Author(s)
  Masaki Azuma, Kengo Oka, Koichiro Nabetani
- Journal Title
  
  Sci. Technol. Adv. Mater.
  
  Volume: 16 Issue: 3 Pages: 034904-034904
- DOI
  10.1088/1468-6996/16/3/034904
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PUBLICLY-26106507, KAKENHI-PROJECT-26800180
[Journal Article] Melting of Pb Charge Glass and Simultaneous Pb－Cr Charge Transfer in PbCrO3 as the Origin of Volume Collapse2015
- Author(s)
  R. Yu, H. Hojo, T. Watanuki, M. Mizumaki, T. Mizokawa, K. Oka, H. Kim, A. Machida, K. Sakaki, Y. Nakamura, A. Agui, D. Mori, T. Inaguma, M. Schlipf, K. Z. Rushshanskii, M. Lezaic, M. Matsuda, J. Ma, S. Calder, M. Isobe, Y. Ikuhara, and M. Azuma
- Journal Title
  
  J. Am.Chem.Soc.
  
  Volume: 137 Issue: 39 Pages: 12719-12728
- DOI
  10.1021/jacs.5b08216
- Peer Reviewed / Acknowledgement Compliant / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-26106507, KAKENHI-PROJECT-25400356, KAKENHI-PROJECT-26800180
[Journal Article] Suppression of temperature hysteresis in negative thermal expansion compound BiNi1-xFexO3 and zero-thermal expansion composite2015
- Author(s)
  K. Nabetani, Y. Muramatsu, K. Oka, K. Nakano,1 H. Hojo, M. Mizumaki, A. Agui, Y. Higo, N. Hayashi, M. Takano, and M. Azuma
- Journal Title
  
  Applied Physics Letters
  
  Volume: 106 Issue: 6 Pages: 061912-061912
- DOI
  10.1063/1.4908258
- Peer Reviewed / Acknowledgement Compliant
- Data Source
  KAKENHI-PUBLICLY-26106507, KAKENHI-PROJECT-26800180, KAKENHI-PROJECT-26247089
[Journal Article] Superconductivity in Noncentrosymmetric Iridium Silicide Li2IrSi32014
- Author(s)
  S. Pyon, K. Kudo, J. Matsumura, H. Ishii, G. Matsuo, M. Nohara, H. Hojo, K. Oka, M. Azuma, V. Ovidiu Garlea, K. Kodama, and S. Shamoto
- Journal Title
  
  Journal of the Physical Society of Japan
  
  Volume: 83 Issue: 9 Pages: 093706-093706
- DOI
  10.7566/jpsj.83.093706
- NAID
  210000133244
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-24510129, KAKENHI-PROJECT-25287094, KAKENHI-PROJECT-25400372, KAKENHI-PROJECT-26287082, KAKENHI-PROJECT-26800180
[Journal Article] High-pressure synthesis of BaVO3: A new cubic perovskite2014
- Author(s)
  K. Nishimura, I. Yamadab, K. Oka, Y. Shimakawa and M. Azuma
- Journal Title
  
  Journal of Physics and Chemistry of Solids
  
  Volume: 75 Issue: 6 Pages: 710-712
- DOI
  10.1016/j.jpcs.2014.02.001
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-26800180
[Presentation] 新物質SrBi3 O 5Fの合成および構造解析2023
- Author(s)
  澤田康平，岡研吾，岩崎光伸
- Organizer
  色材研究発表会2023
- Data Source
  KAKENHI-PROJECT-21K04659
[Presentation] Spin reorientation in layered perovskite oxyfluoride Pb3Fe2O5F22023
- Author(s)
  K. Oka, Y. Nambu, M. Ochi, N. Hayashi, Y. Kusano, T. Aoyama, Y. Ishii, K. Kuroki, S. Mori, M. Takano, N. Noma, M. Iwasaki and H. Kageyama
- Organizer
  Adv. Materials Science 2023
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-21K04659
[Presentation] Bi2VO5F の合成とフッ化挙動の解明2023
- Author(s)
  水谷博香・野間直樹・岡研吾・岩崎光伸
- Organizer
  日本セラミックス協会第36回秋季シンポジウム
- Data Source
  KAKENHI-PROJECT-21K04659
[Presentation] 新物質 SrBi3O5F の合成および構造解析2023
- Author(s)
  澤田康平・野間直樹・岡研吾・岩崎光伸
- Organizer
  日本セラミックス協会第36回秋季シンポジウム
- Data Source
  KAKENHI-PROJECT-21K04659
[Presentation] アニオン複合化物におけるアニオン秩序配列に基づいた機能開拓2021
- Author(s)
  岡　研吾
- Organizer
  日本セラミックス協会2021年度年会
- Invited
- Data Source
  KAKENHI-PUBLICLY-19H04706
[Presentation] アパタイト構造物質の組成制御における結晶構造解析とイオン伝導特性2021
- Author(s)
  西木　渉・岡　研吾・岩崎　光伸
- Organizer
  日本セラミックス協会関西支部第15回学術講演会
- Data Source
  KAKENHI-PROJECT-21K04659
[Presentation] 磁気HOMO-LUMO相互作用の変化に由来するPb3Fe2O5F2のスピン再配向メカニズム2020
- Author(s)
  "(近畿大学) ○岡研吾・(大阪府立大学・生産開発科学研究所) 林直顕・(岡山理科大学) 草野圭弘・(大阪大学) 越智正之・黒木和彦・(東北大学) 青山拓也・(中央大学) 大石克嘉・(生産開発科学研究所) 高野幹夫・(大阪府立大学) 石井悠衣・森茂夫・(京都大学) 陰山洋・(東北大学) 南部雄亮"
- Organizer
  日本セラミックス協会第33回秋季シンポジウム
- Data Source
  KAKENHI-PUBLICLY-19H04706
[Presentation] 新規Ruddlesden-Popper型層状ペロブスカイトPb3Fe2O5F2の構造および磁気転移2019
- Author(s)
  岡研吾, 林直顕, 高野幹夫，草野圭弘，大石克嘉
- Organizer
  日本物理学会第74次年次大会
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] 新規Ruddlesden-Popper型層状ペロブスカイトPb3Fe2O5F2の構造および磁気転移2019
- Author(s)
  岡研吾, 林直顕, 高野幹夫，草野圭弘，大石克嘉
- Organizer
  日本物理学会第74次年次大会
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] 電子ドープによるBi系巨大正方晶相の安定性制御と負の熱膨張2019
- Author(s)
  石崎颯斗、東正樹、酒井雄樹、岡研吾
- Organizer
  公益社団法人日本セラミックス協会 2019年年会
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] 新規Ruddlesden-Popper型層状ペロブスカイトPb3Fe2O5F2の構造および磁気転移2019
- Author(s)
  岡研吾, 林直顕, 高野幹夫，草野圭弘，大石克嘉
- Organizer
  日本物理学会第74次年次大会
- Data Source
  KAKENHI-PUBLICLY-17H05489
[Presentation] 酸フッ化物におけるアニオン秩序と機能の発現2019
- Author(s)
  岡研吾
- Organizer
  応用物理学会秋季学術講演会
- Invited
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] 酸フッ化物におけるアニオン秩序と機能の発現2019
- Author(s)
  岡研吾
- Organizer
  応用物理学会秋季学術講演会
- Invited
- Data Source
  KAKENHI-PUBLICLY-19H04706
[Presentation] フッ化物アパタイトにおけるイオン伝導2018
- Author(s)
  岡研吾・大石克嘉・舩山耕生・植田紘一郎・稲熊宜之
- Organizer
  日本セラミックス協会第31回秋期シンポジウム
- Data Source
  KAKENHI-PUBLICLY-17H05489
[Presentation] F置換によるPbVO3の巨大正方晶歪みの抑制と負熱膨張の実現2018
- Author(s)
  尾形昂洋, 西久保匠, 東正樹, 岡研吾
- Organizer
  日本物理学会2018年秋季大会
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] フッ化アパタイトA5V3O12F (A = Pb, Ba, Sr)におけるフッ素脱離吸収挙動2018
- Author(s)
  岡研吾・大石克嘉、舩山耕生・植田紘一郎・稲熊宜之
- Organizer
  日本セラミックス協会2018年会
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] フッ化アパタイトA5V3O12F (A = Pb, Ba, Sr)におけるフッ素脱離吸収挙動2018
- Author(s)
  岡研吾・大石克嘉、舩山耕生・植田紘一郎・稲熊宜之
- Organizer
  日本セラミックス協会2018年会
- Data Source
  KAKENHI-PUBLICLY-17H05489
[Presentation] Observation of anion order in the Pb-Ti-O-F oxyfluoride system2018
- Author(s)
  Kengo Oka, Hajime Hojo, Masaki Azuma, Katsuyoshi Oh-ishi
- Organizer
  ICPAC Langkawi
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] フッ化物アパタイトにおけるイオン伝導2018
- Author(s)
  岡研吾・大石克嘉・舩山耕生・植田紘一郎・稲熊宜之
- Organizer
  日本セラミックス協会第31回秋期シンポジウム
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] BiNiO3 系負熱膨張物質のサイト間電荷移動と局所構造2018
- Author(s)
  西久保匠・酒井雄樹・岡研吾・綿貫徹・町田晃彦・溝川貴司・東正樹
- Organizer
  第59回高圧討論会
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] Observation of anion order in the Pb-Ti-O-F oxyfluoride system2018
- Author(s)
  Kengo Oka, Hajime Hojo, Masaki Azuma, Katsuyoshi Oh-ishi
- Organizer
  ICPAC Langkawi
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-17H05489
[Presentation] Observation of anion order in the Pb-Ti-O-F oxyfluoride system2018
- Author(s)
  Kengo Oka, Hajime Hojo, Masaki Azuma, Katsuyoshi Oh-ishi
- Organizer
  ICPAC Langkawi
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] Observation of intermetallic charge transfer transition in negative thermal expansion material Bi1-xSbxNiO32017
- Author(s)
  Takumi Nishikubo , Yuki Sakai, Kengo Oka , and Masaki Azuma
- Organizer
  AIRAPT26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] BiNi1-xFexO3の負熱膨張と局所構造2017
- Author(s)
  西久保匠, 前林航紀, 酒井雄樹, 岡研吾, 北條元, 溝川貴司, 綿貫徹, 町田晃彦, 東正樹
- Organizer
  日本物理学会第73回年次大会
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] ペロブスカイトPbVO3へのフィリング制御と正方晶歪み2017
- Author(s)
  山本孟, 尾形昂洋, 岡研吾, 西久保匠, 前林航紀, 酒井雄樹, 東正樹
- Organizer
  本物理学会第73回年次大会
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] 新規酸フッ化物層状ペロブスカイトPb3Fe2O5F2の磁性2017
- Author(s)
  岡研吾、大石克嘉、林直顕、高野幹夫
- Organizer
  日本セラミックス協会秋季シンポジウム
- Data Source
  KAKENHI-PUBLICLY-17H05489
[Presentation] PbリッチBi1-xPbxNiO3の負熱膨張2017
- Author(s)
  酒井雄樹, 岡研吾, 西久保匠, 尾形昂洋, 東正樹
- Organizer
  日本物理学会2017年秋季大会
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] Observation of anion order in the Pb-Ti-O-F oxyfluoride system2017
- Author(s)
  岡研吾、大石克嘉、北條元、東正樹
- Organizer
  IUMRS-ICAM 2017
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PUBLICLY-17H05489
[Presentation] Spin structure change and magnetoelectric effect in the ferroelectric ferromagnet BiFe1-xCoxO32017
- Author(s)
  Hajime Yamamoto, Takumi Kihara, Kengo Oka, Masashi Tokunaga, Ko Mibu, Takuya Aoyama, Tsuyoshi Kimura, and Masaki Azuma
- Organizer
  AIRAPT26
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] ressure induced large volume collapse in PbVO3 and its potential for negative thermal expansion2017
- Author(s)
  岡研吾、大石克嘉、山内徹、上床美也、S. Kanuango, Y. Sakai, 尾形晃宏, 上床美也, T. Saha-Dasgupta, 東正樹
- Organizer
  2nd International Symposium on Negative Thermal Expansion and Related Materials
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] 新規酸フッ化物層状ペロブスカイトPb3Fe2O5F2の磁性2017
- Author(s)
  岡研吾、大石克嘉、林直顕、高野幹夫
- Organizer
  日本セラミックス協会秋季シンポジウム
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] 新規酸フッ化物層状ペロブスカイトPb3Fe2O5F2の合成と結晶構造2017
- Author(s)
  岡研吾・大石克嘉・林直顕・高野幹夫
- Organizer
  日本セラミックス協会2017年会
- Place of Presentation
  日本大学
- Year and Date
  2017-03-17
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] パイロクロア酸フッ化物 Pb2Ti2O6-δ F2δ の結晶構造と物性2016
- Author(s)
  岡研吾・大石克嘉・北條元・東正樹
- Organizer
  日本セラミックス協会2016年会
- Place of Presentation
  早稲田大学
- Year and Date
  2016-03-14
- Data Source
  KAKENHI-PROJECT-26800180
[Presentation] パイロクロア酸フッ化物Pb2Ti2O5.4F1.2におけるアニオン秩序2016
- Author(s)
  岡研吾・大石克嘉・北條元・東正樹
- Organizer
  日本セラミックス協会　第29回秋季シンポジウム
- Place of Presentation
  広島大学
- Year and Date
  2016-09-07
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] Temperature-Independent,Large Dielectric Constant Induced by Vacancy and Partial Anion Order in the Oxyfluoride Pyrochlore Pb2Ti2O6－δF2δ2016
- Author(s)
  Kengo Oka, Katsuyoshi Oh-ishi, Hajime Hojo, Masaki Azuma
- Organizer
  ISAMR2016
- Place of Presentation
  Sun Moon Lake
- Year and Date
  2016-08-11
- Invited / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K05731
[Presentation] 巨大負熱膨張物質 Bi 1-xSb xNiO3のサイト間電荷移動相転移2016
- Author(s)
  西久保匠，岡研吾，酒井雄樹，東正樹
- Organizer
  日本物理学会2016秋季大会
- Place of Presentation
  金沢大学
- Year and Date
  2016-09-13
- Data Source
  KAKENHI-PROJECT-16H02393
[Presentation] 単結晶 PbVO3の高圧下電気抵抗測定2015
- Author(s)
  岡研吾・山内徹・上床美也・東正樹・大石克嘉
- Organizer
  第56回高圧討論会
- Place of Presentation
  JMSアステールプラザ
- Year and Date
  2015-11-10
- Data Source
  KAKENHI-PROJECT-26800180
[Presentation] Observation of anion order in Pb2Ti4O9F22015
- Author(s)
  Kengo Oka, Katsuyoshi Oh-ishi
- Organizer
  STAC9, TOEO-9
- Place of Presentation
  sukuba International Congress Center
- Year and Date
  2015-10-19
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800180
[Presentation] 酸フッ化物PbO-PbF2-TiO2系の合成と構造解析2015
- Author(s)
  岡研吾・大石克嘉
- Organizer
  日本セラミックス協会第28回秋季シンポジウム
- Place of Presentation
  富山大学
- Year and Date
  2015-09-16
- Data Source
  KAKENHI-PROJECT-26800180
[Presentation] Synthesis and structural study of Pb containing oxyfluoride2015
- Author(s)
  Kengo Oka, Katsuyoshi Oh-ishi
- Organizer
  Pacifichem 2015
- Place of Presentation
  Hawaii convention center
- Year and Date
  2015-12-15
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-26800180
[Presentation] ペロブスカイトAA’BB’O6 の高圧合成および構造・物性評価
- Author(s)
  岡研吾，北條元，深谷亮，成瀬卓，沖本洋一，東正樹，綿貫徹， KIM Hyunjeong，町田晃彦，榊浩司、大石克嘉
- Organizer
  第55回高圧討論会
- Place of Presentation
  徳島大学
- Year and Date
  2014-11-22 – 2014-11-24
- Data Source
  KAKENHI-PROJECT-26800180
[Presentation] 新規鉛含有酸フッ化物の合成と結晶構造
- Author(s)
  岡研吾、大石克嘉
- Organizer
  日本セラミックス協会　2015年会
- Place of Presentation
  岡山大学
- Year and Date
  2015-03-18 – 2015-03-20
- Data Source
  KAKENHI-PROJECT-26800180

1. Masaki Azuma (40273510)

# of Collaborated Projects: 1 results

# of Collaborated Products: 17 results
2. 山田幾也 (30378880)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
3. 水牧仁一朗 (60360830)

# of Collaborated Projects: 1 results

# of Collaborated Products: 1 results
4. 綿貫徹 (30343932)

# of Collaborated Projects: 1 results

# of Collaborated Products: 3 results
5. 妹尾仁嗣 (30415054)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
6. 北條元 (90611369)

# of Collaborated Projects: 1 results

# of Collaborated Products: 3 results
7. Inaguma Yoshiyuki

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
8. HONGOU Kenta

# of Collaborated Projects: 0 results

# of Collaborated Products: 2 results
9. OGINO Hiraku

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
10. MAEZONO Ryo

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
11. OKIMOTO Yoichi

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
12. 八島正知

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
13. 山方啓

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
14. 社本真一

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
15. 樹神克明

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
16. 羽田真毅

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
17. 腰原伸也

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results
18. 中惇

# of Collaborated Projects: 0 results

# of Collaborated Products: 1 results

Oka Kengo 岡 研吾

Research Projects

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アニオン組成制御による負熱膨張材料の開発と物質設計指針の確立Principal Investigator

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Exploration of novel fluoride anion conductors with rigid frameworksPrincipal Investigator

Principal Investigator

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Pb,Biを含む酸フッ化物における特異的な物性の開拓と起源の解明Principal Investigator

Principal Investigator

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簡便かつ安価な合成法を用いた新規Pb,Bi含有酸フッ化物の物質探索Principal Investigator

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Clarification of s-d interorbital charge distribution change in Bi and Pb-perovskites and the application to giant negative thermal expansion materials

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Investigation of the anion order in Pb/Bi containing mixed anion compoundsPrincipal Investigator

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Investigation of the exotic properties originated from a large tetragonal distrotionPrincipal Investigator

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[Journal Article] Anionic order in Pb2Ti4O9F2 Revisited by nuclear magnetic resonance and density functional theory2022

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[Journal Article] Negative Thermal Expansion in Fluoroapatite Pb<sub>5</sub>(VO<sub>4</sub>)<sub>3</sub>F Enhanced by the Steric Effect of Pb<sup>2+</sup>2022

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Journal Title

DOI

Data Source

[Journal Article] Site preference of fluoride anion and potential ionic conductivity in fluorapatites <i>A</i><sub>5</sub>(VO<sub>4</sub>)<sub>3</sub>F (<i>A</i> = Pb, Sr, and Ba)2022

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[Journal Article] Exploring novel functional properties arose from anion order in mixed anion compounds2021

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[Journal Article] Light Absorption Properties and Electronic Band Structures of Lead‐Vanadium Oxyhalide Apatites Pb5(VO4)3X (X=F, Cl, Br, I)2020

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[Journal Article] Oxyfluoride Pb2Ti4O9F2 as a Stable Anode Material for Photoelectrochemical Water Oxidation2020

Oka Kengo 岡研吾