Enhancement of Polarization Property of PZT Film by Ion-Substitution Using Rare-Earth Elements

• Nakaki Hiroshi

  Department of Chemistry, Sophia University

• Uchida Hiroshi

  Department of Chemistry, Sophia University

• Nishida Ken

  Department of Electronic and Photonic System Engineering, Kochi University

• Osada Minoru

  Advanced Materials Laboratory, National Institute of Materials Science (NIMS)

• Funakubo Hiroshi

  Department of Innovative and Engineered Materials, Tokyo Institute of Technology

• Katoda Takashi

  Department of Electronic and Photonic System Engineering, Kochi University

• Koda Seiichiro

  Department of Chemistry, Sophia University

抄録

Rare-earth-substituted lead zirconate titanate thin films were synthesized to improve the ferroelectric properties of lead zirconate titanate through the enhancement of its crystal anisotropy. Thin films of Pb_{1.00−(3x⁄2)}RE_x(Zr_0.40Ti_0.60)O₃ [RE-PZT(A)] and Pb_1.00RE_x(Zr_0.40Ti_0.60)_1−(3x⁄4)O₃ [RE-PZT(B)] with RE=La or Dy were deposited on (111)Pt/Ti/SiO₂/(100)Si substrates by chemical solution deposition (CSD). Rare-earth-substitution did not affect the crystal orientation of the PZT-based films where the PZT(111) plane was oriented along the surface-normal direction. Dy³⁺ substitution based on Dy-PZT(B) up to x=0.02 enhanced the crystal anisotropy (c⁄a) and remanent polarization (P_r) of PZT films simultaneously, while both c⁄a and P_r values of Dy-PZT(A) decreased as x increased continuously. On the other hand, La³⁺ substitution degraded the ferroelectric properties gradually in both the case of La-PZT(A) and (B). The Dy³⁺ ion could be substituted for a B-site in a PZT crystal preferentially, and that promoted the crystal anisotropy and the ferroelectric properties of PZT films.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 44 (9B), 6905-6909, 2005

  The Japan Society of Applied Physics

キーワード

• ferroelectrics
• lead zirconate titanate
• chemical solution deposition
• rare earths
• lanthanum
• dysprosium
• ion substitution
• <I>P</I>–<I>E</I> hysteresis loop
• raman spectrum

詳細情報

• CRID: 1390282681242182656
• NII論文ID: 210000058802
• NII論文ID: 40006898852
• NII論文ID: 130004534673
• NII書誌ID: AA10457675
• DOI: 10.1143/jjap.44.6905
• ISSN: 13474065
• ISSN: 00214922
• NDL書誌ID: 7460177
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I7460177
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.44.6905
• Web Site: https://iopscience.iop.org/article/10.1143/JJAP.44.6905/pdf
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
  • CiNii Articles
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