Improving the Electrical Properties of Zr-Doped Bi3.15Nd0.85Ti3O12 Thin Films by Engineering Polarization Rotation

Yang, Feng; Guo, Yichen; Zong, Zhihao; Hao, Xuehong; Shi, Yiwen; Tang, Minghua

doi:10.1007/s11664-016-4508-3

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…4,5 This small reduction is in contrast to Asite doping, which can reduce T c by several hundred kelvin. 9 BiT films doped at A-site with elements such as La 10 or Nd 11,12 exhibit good polarization and fatigue properties.…”

Section: Introductionmentioning

confidence: 99%

Integration and High-Temperature Characterization of Ferroelectric Vanadium-Doped Bismuth Titanate Thin Films on Silicon Carbide

Ekström

Khartsev

Östling

et al. 2017

Journal of Elec Materi

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4H-SiC electronics can operate at high temperature (HT), e.g., 300°C to 500°C, for extended times. Systems using sensors and amplifiers that operate at HT would benefit from microcontrollers which can also operate at HT. Microcontrollers require nonvolatile memory (NVM) for computer programs. In this work, we demonstrate the possibility of integrating ferroelectric vanadiumdoped bismuth titanate (BiTV) thin films on 4H-SiC for HT memory applications, with BiTV ferroelectric capacitors providing memory functionality. Film deposition was achieved by laser ablation on Pt (111)/TiO 2 /4H-SiC substrates, with magnetron-sputtered Pt used as bottom electrode and thermally evaporated Au as upper contacts. Film characterization by x-ray diffraction analysis revealed predominately (117) orientation. P-E hysteresis loops measured at room temperature showed maximum 2P r of 48 lC/cm 2 , large enough for wide read margins. P-E loops were measurable up to 450°C, with losses limiting measurements above 450°C. The phase-transition temperature was determined to be about 660°C from the discontinuity in dielectric permittivity, close to what is achieved for ceramics. These BiTV ferroelectric capacitors demonstrate potential for use in HT NVM applications for SiC digital electronics.

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