SHG studies of multi-ferroelectricity of hexagonal rare-earth ferrite thin films

2013 Fiscal Year Final Research Report

• Project/Area Number: 23540379
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Condensed matter physics I
• Research Institution: Waseda University
• Principal Investigator: UESU Yoshiaki 早稲田大学, 理工学術院, 名誉教授 (10063744)
• Project Period (FY): 2011 – 2013
• Keywords: 強誘電体 / マルチフェロ物質 / 強弾性体 / SHG顕微鏡 / 薄膜 / 希土類フェライト / 錫ペロブスカイト酸化物 / チタン酸カルシウム

Research Abstract

Under this research project, the following three results were attained. (1)The coexistence of ferroelectricity and magnetic order in epitaxial hexagonal YbFeO3 thin films fabricated by the PLD method was experimentally found for the first time (published in J.Phys.Soc.Jpn. 2012) (2) Sn doped PbTiO3 thin films were successfully synthesized using a newly developed PLD method with three different ceramic targets. It was revealed that the films is a mixed state of SnTiO3, PbSnO3, and PbTiO3 and ferroelectrics with Tc of 277C. (3) The polar nature of twin boundaries (TBs) of inherently non-polar ferroelastic CaTiO3 was examined by the confocal SHG microscope. Three-dimensional SHG images confirmed that both crystallographically prominent TB and non-prominent TB are SHG active and consequently polar. The point group symmetries of the TBs and directions of the electric polarization are determined from the anisotropy of SHG intensities (published in Phys.Rev.B 2014).

Research Products

• [Journal Article] Direct evidence of polar nature of ferroelastic twin boundaries in CaTiO3 obtained by second harmonic generation microscope (2014)
  • Author(s): H. Yokota, H. Usami, R. Haumont, P. Hicher, J. Kaneshiro, E. K. H. Salje, and Y. Uesu
  • Journal Title: Physical Review. B Volume: 89 Pages: 144109
  • Peer Reviewed
• [Journal Article] Identification of LiNbO3, LiNb3O8 and Li3NbO4 phases in thin films synthesized with different deposition techniques by means of XRD and Raman spectroscopy (2013)
  • Author(s): A. Bartasyte, V. Plausinaitiene, A. Abrutis, S. Stanionyte, S. Margueron, P. Boulet, T. Kobata, Y. Uesu, and J. Gleize
  • Journal Title: Journal of Physics, Condensed Matter Volume: 25 Pages: 20590
  • Peer Reviewed
• [Journal Article] Ferroelectricity and Ferrimagnetism of Hexagonal YbFeO3 Thin Films (2012)
  • Author(s): H. Iida, T. Koizumi, Y. Uesu, K. Kohn, N. Ikeda, S. Mori, R. Haumont, P.-E. Janolin, J. M. Kiat, M. Fukunaga, and Y. Noda
  • Journal Title: Journal of Physical Society of Japan Volume: 81 Pages: 024719
  • Peer Reviewed
• [Journal Article] Optical Second Harmonic Generation Microscopy as a Tool of Material Diagnosis(Invited Review paper) (2012)
  • Author(s): H. Yokota, J. Kaneshiro, Y. Uesu
  • Journal Title: Physics Research International Volume: Vol. 2012 Pages: 704634, 12
  • DOI: 10.1155/2012/704634
  • Peer Reviewed
• [Journal Article] Ferroelectricity and ferromagnetism of BaTiO3/BaFeO3 super-lattice thin films (2012)
  • Author(s): J. Fukatani, H. Yokota, Y. Uesu, M. Fukunaga, Y. Noda
  • Journal Title: Japanese Journal of Applied Physics Volume: 51 Pages: 09LB01, 4
  • Peer Reviewed
• [Journal Article] Polarization properties of bismuth strontium tantalate ceramic films deposited by aerosol deposition method (2012)
  • Author(s): M. Suzuki, Y. Nishihara, Y. Uesu, J. Akedo
  • Journal Title: Japanese Journal of Applied Physics Volume: 51 Pages: 09LA17, 4
  • Peer Reviewed
• [Presentation] Polar nature of twin boundaries of inherently non-polar ferroelastic CaTiO3 evidenced by SHG microscope (2014)
  • Author(s): Y. Uesu
  • Organizer: Electroceramics XIV
  • Place of Presentation: ブカレスト, ルーマニア
  • Year and Date: 2014-06-17
  • Invited
• [Presentation] Sn-substituted perovskite oxide films - newly featured ferroelectrics - (2013)
  • Author(s): Y. Uesu
  • Organizer: International Meeting of Ferroelectrics
  • Place of Presentation: クラコフ, ポーランド
  • Year and Date: 2013-09-03
  • Invited
• [Presentation] SHG microscope and its application to domain structure analyses of PZN/PT at the MPB (2013)
  • Author(s): Y. Uesu
  • Organizer: International WS on relaxors
  • Place of Presentation: Ioffe Physco-Technical Institute, サンクトペテルスブルグ, ロシア
  • Year and Date: 2013-07-05
  • Invited
• [Presentation] SHG microscope revisited (2012)
  • Author(s): Y. Uesu
  • Organizer: 9th Korean-Japan Conference of Ferroelectricity
  • Place of Presentation: 蔚山, 韓国
  • Year and Date: 2012-08-12
  • Invited
• [Presentation] 光第2高調波顕微鏡でドメインを観る (2012)
  • Author(s): 上江洲由晃
  • Organizer: 強誘電体応用会議
  • Place of Presentation: 京都コープホテル
  • Year and Date: 2012-05-24
  • Invited
• [Presentation] SHGを利用した分域構造解析 (2012)
  • Author(s): 上江洲由晃
  • Organizer: 第67回日本物理学会年次大会
  • Place of Presentation: 関西学院大学
  • Year and Date: 2012-03-25
  • Invited
• [Presentation] シンポジウム「分極反転が拓く光制御の未来」イントロダクトリートーク (2012)
  • Author(s): 上江洲由晃
  • Organizer: 応用物理学会春季講演会
  • Place of Presentation: 早稲田大学
  • Year and Date: 2012-03-15
  • Invited
• [Presentation] Ferroelectric (PbSnTi)O3 thin films synthesized by nucleation-mixture depositions and their structural and dielectric properties (2012)
  • Author(s): Y.Uesu
  • Organizer: WS of fundamental physics of ferroelectricity
  • Place of Presentation: Argonne National Laboratory, 米国
  • Year and Date: 2012-01-29
• [Presentation] Ferroelectricity and ferrimagnetism of thin-film stabilized hexagonal YbFeO3 (2011)
  • Author(s): Y.Uesu
  • Organizer: 強誘電体応用国際会議(ISAF2011)
  • Place of Presentation: カナダ
  • Year and Date: 2011-07-27
  • Invited
• [Book] 「物性物理学ハンドブック」リラクサー
  • Author(s): 上江洲由晃
  • Total Pages: 11
  • Publisher: 朝倉書店