Critical thickness of ultrathin ferroelectric BaTiO3 films

@inproceedings{Kim2005CriticalTO,
  title={Critical thickness of ultrathin ferroelectric BaTiO3 films},
  author={Yu Seung Kim and Dae Ho Kim and Jung-Bum Kim and Young Jun Chang and Tae Won Noh and J. H. Kong and Kookheon Char and Yun Daniel Park and Sang Don Bu and Jong-Gul Yoon and Jin-Seok Chung},
  year={2005}
}
To investigate the critical thickness of ferroelectric BaTiO3 (BTO) films, we fabricated fully strained SrRuO3∕BTO∕SrRuO3 heterostructures on SrTiO3 substrates by pulsed laser deposition with in situ reflection high-energy electron diffraction. We varied the BTO layer thickness from 3to30nm. By fabricating 10×10μm2 capacitors, we could observe polarization versus electric-field hysteresis loops, which demonstrate the existence of ferroelectricity in BTO layers thicker than 5nm. This observation… CONTINUE READING

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