Investigation of the exotic properties originated from a large tetragonal distrotion
Project/Area Number |
26800180
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Condensed matter physics II
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Research Institution | Chuo University |
Principal Investigator |
Oka Kengo 中央大学, 理工学部, 助教 (80602044)
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Project Period (FY) |
2014-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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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.
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Report
(3 results)
Research Products
(15 results)
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[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
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Journal Title
J. Am.Chem.Soc.
Volume: 137
Issue: 39
Pages: 12719-12728
DOI
Related Report
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[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
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Journal Title
Applied Physics Letters
Volume: 106
Issue: 6
Pages: 061912-061912
DOI
Related Report
Peer Reviewed / Acknowledgement Compliant
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[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
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Journal Title
Journal of the Physical Society of Japan
Volume: 83
Issue: 9
Pages: 093706-093706
DOI
NAID
Related Report
Peer Reviewed
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