Journal ArticleDOI
Self-assembling ferroelectric Na0.5K0.5NbO3 thin films by pulsed-laser deposition
C. R. Cho,Alexander M. Grishin +1 more
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TLDR
In this article, single-phase Na0.5K 0.5NbO3 (NKN) thin films have been grown on polycrystalline Pt80Ir20 (Pt) and SiO2 (native oxide)/Si (111) substrates using KrF excimer laser ablation of a stoichiometric ceramic target.Abstract:
Highly [100]-axis oriented single-phase Na0.5K0.5NbO3 (NKN) thin films have been grown on polycrystalline Pt80Ir20 (Pt) and SiO2 (native oxide)/Si (111) substrates using KrF excimer laser ablation of a stoichiometric ceramic target. X-ray diffraction θ–2θ scan and rocking curve data are evidence of the strong effect of film self-assembling along the [100] direction regardless of the substrate texture. Furthermore, multiple-cell structuring along the polar axis has been observed in NKN films grown onto the Pt substrate. Ferroelectric measurements yield remnant polarization Pr of 10 μC/cm2 and spontaneous polarization Ps of 17.5 μC/cm2 at 80 kV/cm. The electrical resistivity of the Na0.5K0.5NbO3 film was in the order of 1010 Ω cm at 10 kV/cm. Dielectric permittivity e′ and dissipation factor tan δ have been found to vary 480–440 and 0.028–0.024, respectively, in the frequency range 0.4–100 kHz.read more
Citations
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Perspective on the Development of Lead-free Piezoceramics
TL;DR: In this paper, general guidelines for the development of lead-free piezoelectric ceramics are presented, ranging from atom to phase diagram, and the current development stage in lead free piezoceramics is then critically assessed.
Journal ArticleDOI
Do we really need ferroelectrics in paraelectric phase only in electrically controlled microwave devices
TL;DR: In this article, the possibilities and benefits of using ferroelectrics in polar phase in electrically controllable microwave devices are considered explicitly for the first time, and the authors consider the use of ceramic (bulk and thick film) ferro-electrics for industrial applications.
Journal ArticleDOI
Fabrication and ferroelectric properties of highly dense lead-free piezoelectric (K0.5Na0.5)NbO3 thick films by aerosol deposition
TL;DR: In this article, a lead-free piezoelectric thin/thick film was fabricated by aerosol-deposition method and the thickness of KNN film was 7.1μm and fully dense films were obtained.
Journal ArticleDOI
Background oxygen effects on pulsed laser deposited Na0.5K0.5NbO3 films: From superparaelectric state to ferroelectricity
C. R. Cho,Alexander M. Grishin +1 more
TL;DR: In this article, the compositional, crystalline, and electrical properties of Na05K05NbO3 (NKN) thin films grown onto polycrystalline Pt80Ir20 and SiO2 (native oxide)/Si(111) substrates were found to be single phase and highly c-axis oriented X-ray diffraction θ-2θ scans and rocking curve data show a strong effect of NKN film self-assembling along the [001] direction regardless of the substrate texture.
Journal ArticleDOI
Lead-Free Piezoelectric (K,Na)NbO3 Thin Films Derived from Metal Alkoxide Precursors
TL;DR: In this article, a lead-free piezoelectric K0.5NbO3 (KNN) single-phase thin film with good leakage current properties was successfully prepared by optimizing the KxNaxNbOn3 (x0.55Nb On3) composition of the precursor solution.
References
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L. Egerton,Dolores M. Dillon +1 more
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Effects of high‐flux low‐energy (20–100 eV) ion irradiation during deposition on the microstructure and preferred orientation of Ti0.5Al0.5N alloys grown by ultra‐high‐vacuum reactive magnetron sputtering
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Cu0, Cu+, and Cu2 from excimer‐ablated copper
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Related Papers (5)
Background oxygen effects on pulsed laser deposited Na0.5K0.5NbO3 films: From superparaelectric state to ferroelectricity
C. R. Cho,Alexander M. Grishin +1 more