Detection of sub-pico-meter-scale atomic displacement in ferroelectric phase of multiferroic materials

2012 Fiscal Year Final Research Report

• Project/Area Number: 23654098
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Condensed matter physics I
• Research Institution: Tohoku University
• Principal Investigator: KIMURA Hiroyuki 東北大学, 多元物質科学研究所, 准教授 (50312658)
• Co-Investigator(Renkei-kenkyūsha): NODA Yukio 東北大学, 多元物質科学研究所, 教授 (80127274) ; KIYANAGI Ryoji 独立行政法人日本原子力研究開発機構, J-PARCセンター, 研究員 (50521770)
• Project Period (FY): 2011 – 2012
• Keywords: 磁気誘起強誘電性 / 精密結晶構造解析 / 原子変位

Research Abstract

Sub-pico scale atomic displacement contributing to electric polarization in multiferroic material of YMn2O5 has been detected. We developed the measurement program for avoiding “spurious" signal coming from multiple scattering, which enables to extract intrinsic signals in ferroelectric phase. We have found the order parameter of the ferroelectric displacement of which evolution follows the temperature dependence of the electric polarization.

Research Products

• [Presentation] マルチフェロイック物質Tm_<1-x>Yb_xMn_2O_5単結晶の磁性と強誘電性 (2013)
  • Author(s): 木村宏之,山崎健太,中野隆裕,福永守,野田幸男,石垣徹,In-Hwan Oh,Shin Ae Kim,Chang Hee Lee
  • Organizer: 日物理学会年次大会
  • Year and Date: 2013-03-28
• [Presentation] マルチフェロイック物質YMn_2O_5の磁気誘起強誘電相における原子変位 (2013)
  • Author(s): 中野隆裕,木村宏之,堀尾哲,坂倉輝俊,野田幸男,中尾朗子,竹中康之,岸 俊二,中尾裕則,村上洋一,石川喜久
  • Organizer: 日本物理学会年次大会
  • Year and Date: 2013-03-26
• [Presentation] マルチフェロイック物質^<153>EuMn_2O_5の強誘電相と非強誘電相の磁気構造 (2012)
  • Author(s): 木村宏之,林勁,野田幸男,福永守,I.-H. Oh,S.-A. Kim,C.-H. Lee
  • Organizer: 日本中性子科学会年会
  • Year and Date: 2012-12-10
• [Presentation] Relation between ferroelectricity and magnetic structure in multiferroic EuMn_2O_5 (2012)
  • Author(s): H. Kimura, S. Fujiyama, J. Lin, M. Fukunaga, Y. Noda, H. Hiraka, I.-H. Oh, S.-A. Kim, and C.-H. Lee
  • Organizer: AsCA12/CRYSTAL28
  • Place of Presentation: Adelaide, Australia
  • Year and Date: 2012-12-04
• [Presentation] 混晶系マルチフェロイクス(1-x)BiFeO3-xPbTiO3の結晶構造と相図 (2012)
  • Author(s): 萩谷聡,石川喜久,木村宏之,Chang-Hee Lee,Seongsu Lee,野田幸男,鬼柳亮嗣
  • Organizer: 日本結晶学会年会
  • Year and Date: 2012-10-25
• [Presentation] マルチフェロイクスYMn_2O_5のスピン波観測 (2012)
  • Author(s): 木村宏之,古川圭作,脇本秀一,梶本亮一,中島健次,野田幸男
  • Organizer: AEA-CROSSプロジェクト研究研究会
  • Year and Date: 2012-09-21
• [Presentation] 混晶系マルチフェロイクス(1-x)BiFeO3-xPbTiO3の誘電性と結晶構造 (2012)
  • Author(s): 萩谷聡,石川喜久,木村宏之,Chang-HeeLee,SeongsuLee,野田幸男,鬼柳亮嗣
  • Organizer: 日本物理学会秋季大会
  • Year and Date: 2012-09-20
• [Presentation] 放射光単結晶X線回折によるYTiO_3の軌道秩序の研究 (2012)
  • Author(s): 坂倉輝俊,中野隆裕,木村宏之,野田幸男,石川喜久,十倉好紀,宮坂茂樹
  • Organizer: 日物理学会秋季大会
  • Year and Date: 2012-09-20
• [Presentation] Pressure-induced magnetic and ferroelectric phase transition in Multiferroic EuMn2O5 (2012)
  • Author(s): H. Kimura, S. Fujiyama, J. Lin, M. Fukunaga, Y. Noda, H. Hiraka, S.-A. Kim, and C.-H. Lee
  • Organizer: The 9^<th> Korea-Japan Conference on Ferroelectrics
  • Place of Presentation: Ulsan, KOREA
  • Year and Date: 2012-08-08
• [Presentation] Orbital order in YTiO_3 Observed by Super Accurate Synchrotron X-rat Diffraction (2012)
  • Author(s): T. Sakakura , Y. Ishikawa, T. Nakano, H. Kimura, Y. Noda, Y. Tokura, and S. Miyasaka
  • Organizer: The 9^<th> Korea-Japan Conference on Ferroelectrics
  • Place of Presentation: Ulsan, KOREA
  • Year and Date: 2012-08-08