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- W1571890967 abstract "Abstract Fatigue free ferroelectric Pb5Ge3O11 (PGO) films have been prepared using metalorganic chemical vapor deposition (MOCVD). [Pb(thd)2] and [Ge(OC2H5)4] were used as the precursors for lead and germanium, respectively. The PGO films were deposited onto Ir/Ti/SiO2/Si and Pt/Ti/SiO2/Si wafers to measure their compositions, phase formation, microstructures and ferroelectric properties. The X-ray pattern showed the formation of C-axis oriented PGO films. All the PGO films showed excellent fatigue characteristics: no fatigue was observed up to 1 × 109 switching cycles. It is believed that the superior fatigue properties of these PGO films are due to the PGO lattice structure. PGO materials have large polarization along the c axis, but little or no polarization along a and b axis, thus the domain configuration is 180°. This is one reason that PGO has excellent fatigue properties, which is similar to Bi-layered oxides such as SrBi2Ta2O9 material. A typical 300-nm thick PGO film exhibited a saturated and square hysteresis loop. The remanent polarization (2Pr) and coercive field (2Ec) values at 5V were about 3.72 μC/cm2 and 67 kV/cm, respectively. The leakage current increased with increasing applied voltage, and is about 9.5 × 10−7 A/cm2 at 100 kV/cm. The maximum dielectric constant is about 35. The MOCVD PGO films can be used for single transistor memory applications." @default.
- W1571890967 created "2016-06-24" @default.
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- W1571890967 date "1999-10-01" @default.
- W1571890967 modified "2023-09-23" @default.
- W1571890967 title "Fatigue free ferroelectric Pb<sub>5</sub>Ge<sub>3</sub>O<sub>11</sub> thin films prepared by metalorganic chemical vapor deposition" @default.
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- W1571890967 doi "https://doi.org/10.1080/10584589908215612" @default.
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