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Ferroelectric $SrBi_2Ta_2O_9$ Thin Films by Liquid-Delivery Metalorganic Chemical Vapor Deposition using $Sr[Ta(OEt)_5(dmae)]_2$ and $Bi(C_6H_5)_3$
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  • Ferroelectric $SrBi_2Ta_2O_9$ Thin Films by Liquid-Delivery Metalorganic Chemical Vapor Deposition using $Sr[Ta(OEt)_5(dmae)]_2$ and $Bi(C_6H_5)_3$
저자명
Shin. Wonng-Chul,Choi. Kyu-Jeong,Park. Chong-Man,Yoon. Soon-Gil
간행물명
The Korean journal of ceramics
권/호정보
2000년|6권 3호|pp.219-223 (5 pages)
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한국세라믹학회
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

The ferroelectric SBT films were deposited on Pt/Ti/SiO$_2$/Si substrates by liquid injection metalorganic chemical vapor deposition (MOCVD) with single-mixture solution of Sr[Ta(OEt)$_5$(dmae)]$_2$and Bi(C$_6$ 6/H$_5$)$_3$. The Sr/Ta and Bi/Ta ratio in SBT films depended on deposition temperature and mol ratio of precursor in the single-mixture solution. At the substrate temperature of 40$0^{circ}C$, Sr/Ta and Bi/Ta ratio were close to 0.4 and 1 at precursor mol ratio of 0.5~1.0, respectively. As-deposited film was amorphous. However, after annealing at 75$0^{circ}C$ for 30 min in oxygen atmosphere, the diffraction patterns indicated polycrystalline SBT phase. The remanent polarization (Pr) and coercive field (Ec) of SBT film annealed at 75$0^{circ}C$ were 4.7$mu$C/$ extrm{cm}^2$ and 115.7kV/cm at an applied voltage of 5V, respectively. The SBT films annealed at 75$0^{circ}C$ showed practically no polarization fatigue up to 10$^10$ switching cycles.