Dielectric property controls using crystal structure anisotropy in bismuth layer-structured dielectrics

Muneyasu Suzuki, Kenji Takahashi, Takayuki Watanabe, Tadashi Takenaka, Hiroshi Funakubo

研究成果: 書籍/レポート タイプへの寄稿会議への寄与


Temperature dependency of the dielectric property of c-axis-orientcd SrBi4Ti4O15 films was investigated in a temperature range from 80 to 400 K. c-axis-oriented epitaxial films with the film thickness of 30 and 140 nm were grown on (100)cSrRuO 3//(100)SrTiO3 substrates by metal organic chemical vapor deposition (MOCVD). Increasing lattice distortions along the aand c-axes with decreasing film thickness was ascertained by XRD reciprocal space mapping. However, capacitance change normalized by the capacitance data at 300 K for with temperature was independent of the film thickness; it increased from 80 to 230 K and contrary decreased with increasing the temperature. Especially, the temperature coefficient of capacitance from 230 to 330 K was almost the same. It indicates that dielectric characteristics of these films for the temperature are independent of the film thickness in the actual use. Moreover, the same mesurement for the 120 nm-thick fiber-textured c-axis-oriented SrBi 4Ti4O15 film deposited on the (100) cLaNiO3/(111)Pt/TiO2/SiO2/(100)Si substrate was also investigated. Resultant capacitance change with the temperature was basically the same with that of the epitaxial one, even though the temperature at maximum capacitance value was slightly shifted to lower temperature of 200 K. These data suggest that of capacitance change with the temperature was almost independent of the film thickness and the in-plane orientation.

ホスト出版物のタイトルFerroelectric Thin Films XIII
出版社Materials Research Society
ISBN(印刷版)155899856X, 9781558998568
出版ステータス出版済み - 2005
イベント2005 MRS Fall Meeting - Boston, MA, 米国
継続期間: 11月 28 200512月 2 2005


名前Materials Research Society Symposium Proceedings


その他2005 MRS Fall Meeting
CityBoston, MA

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 凝縮系物理学
  • 材料力学
  • 機械工学


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