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Investigation of the exotic properties originated from a large tetragonal distrotion

Research Project

Project/Area Number 26800180
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Condensed matter physics II
Research InstitutionChuo University

Principal Investigator

Oka Kengo  中央大学, 理工学部, 助教 (80602044)

Project Period (FY) 2014-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords精密構造解析 / 放射光粉末X線回折 / リートベルト解析 / 酸フッ化物 / 固体化学 / 構造物性 / アニオン複合化
Outline of Final Research Achievements

New oxyfluoride system which contains Pb and Ti was invesitigated based on the tetragonal perovskite PbTiO3. Our study found novel oxyfluorides, Pb2Ti4O9F2とPb2Ti2O5.4F1.2. Bond valence sum calculations and determining electron density distribution by the maximum entropy method reveled presence of O/F anion order in Pb2Ti4O9F2. Pb2Ti2O5.4F1.2 was a pyrochlore with centrosymmetric space group, however, exhibited an unusual large dielectric constant. Presence of local distortion may be the origin of the high dielectric constant.

Report

(3 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Research-status Report
  • Research Products

    (15 results)

All 2016 2015 2014 Other

All Journal Article (7 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 7 results,  Acknowledgement Compliant: 5 results,  Open Access: 1 results) Presentation (7 results) (of which Int'l Joint Research: 2 results) Remarks (1 results)

  • [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

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [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

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [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

    • Related Report
      2015 Annual Research Report 2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [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

    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [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

    • Related Report
      2015 Annual Research Report 2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [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

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [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

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [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
    • Related Report
      2015 Annual Research Report
  • [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
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [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
    • Related Report
      2015 Annual Research Report
  • [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
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research
  • [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
    • Related Report
      2015 Annual Research Report
  • [Presentation] 新規鉛含有酸フッ化物の合成と結晶構造2015

    • 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
    • Related Report
      2014 Research-status Report
  • [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2014

    • 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
    • Related Report
      2014 Research-status Report
  • [Remarks] 温めると縮む不思議な材料

    • URL

      http://www.yomiuri.co.jp/adv/chuo/research/20150430.html

    • Related Report
      2015 Annual Research Report

URL: 

Published: 2014-04-04   Modified: 2020-05-15  

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