Fabrication of (100)c-oriented Mn-doped bismuth ferrite films on silicon and stainless steel substrates using calcium niobate nanosheets

Kohei Nagasaka, Naoya Oshima, Jin Woong Kim, Hiromi Shima, Akihiro Akama, Takanori Kiguchi, Ken Nishida, Toyohiko J. Konno, Hiroshi Funakubo, Hiroshi Uchida

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

One-axis-oriented BiFeO3 (BFO)-based films were fabricated on platinized silicon and SUS 316L substrates using nanosheets of calcium niobate (ns-CN) with pseudo-perovskite crystal structure. Ca2Nb3O10 nanosheets (ns-CNs) were supported on the substrates by dip coating, followed by chemical solution deposition (CSD) of Mn-doped BFO (Mn-BFO) films. Preferential crystal growth of (100)-oriented BFO films was achieved on both ns-CN/(111)Pt/TiO2/(100)Si and ns-CN/(111)Pt/SUS316L substrates. The out-of-plane lattice parameters of the BFO films on ns-CN/(111)Pt/SUS316L were larger than the parameter reported for BFO bulk because of elastic deformation caused by thermal stress between the BFO films and SUS316L substrate, whereas those of the films on ns-CN/(111)Pt/TiO2/(100)Si were smaller than the reported value. The remanent polarization of the Mn-BFO films was enhanced to approximately 60 μC/cm2 on ns-CN/(111)Pt/SUS316L because of the compressive thermal stress that causes elastic elongation of Mn-BFO crystals to align or change the tilt angle of their polar axes for the substrate surface.

Original languageEnglish
Pages (from-to)322-328
Number of pages7
JournalJournal of the Ceramic Society of Japan
Volume123
Issue number1437
DOIs
Publication statusPublished - 2015 Jan 1

Keywords

  • Bismuth ferrite
  • Calcium niobate
  • Chemical solution deposition (csd)
  • Crystal orientation
  • Ferroelectrics
  • Nanosheets
  • Thermal stress
  • Thin film

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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