Dielectric Ba0.6Sr0.4TiO3 thin films were epitaxially grown on (001) MgO by using pulsed laser ablation. Microstructure studies from x-ray diffraction and electron microscopy suggest that the as-grown are c-axis oriented with an interface relationship of 〈100〉BSTO//〈100〉MgO. A room temperature coupled microwave phase shifter has been developed a shift near 250° at 23.675 GHz under electrical field 40 V/μm figure merit ∼53°/dB. The performance based epitaxial is close to needed for practical...

PbTiO 3 /SrTiO superlattices were grown on (001) SrTiO3 substrates by reactive molecular beam epitaxy (MBE). Sharp superlattice reflections observed x-ray diffraction. High-resolution transmission electron microscopy of a [(PbTiO3)10/(SrTiO3)10]15 revealed that the PbTiO3/SrTiO3 interface structure is atomically sharp. The interfaces are fully coherent; no misfit dislocations or other crystal defects in microscopy. Selected area diffraction patterns indicated PbTiO3 layers oriented with c...

High dielectric CaCu3Ti4O12 (CCTO) thin films were epitaxially grown on (001) LaAlO3 (LAO) substrates by pulsed laser deposition. Microstructural studies x-ray diffraction, pole figure measurements, and transmission electron microscopy show that the as-grown are good single crystalline quality with an interface relationship of (001)CCTO//(001)LAO [100]CCTO//[100]LAO. Dielectric property measurements have extremely high constant value 10 000 at 1 MHz room temperature. It is interesting to...

Ferroelectric Ba0.6Sr0.4TiO3 thin films with 2% Mn additional doping were grown on (001) MgO by pulsed laser deposition. The microstructural studies from x-ray diffraction and transmission electron microscopy indicate that the are highly epitaxial c-axis oriented atomic sharp interface. Dielectric property measurements at 1 MHz room temperature reveal as-grown have outstanding dielectric properties large tunability of 80% 40KV∕cm, very constant value 3800, extra low loss only 0.001. high...

A short-period (BaTiO3)6∕(SrTiO3)5 superlattice was characterized by x-ray diffraction and transmission electron microscopy. The is epitaxially oriented with the c axes of BaTiO3 SrTiO3 normal to (001) surface substrate. Despite large in-plane lattice mismatch between (∼2.2%), interfaces were found be nearly commensurate. crystallographic c∕a ratio measured results agree quantitatively first-principles calculations phase-field modeling. agreement supports validity enhanced spontaneous...

The microstructure of epitaxial SrRuO3 thin films grown on vicinal (001) SrTiO3 substrates with miscut angle 1.9° and direction 12° away from [100] was studied using transmission electron microscopy (TEM). Cross-section as well plan-view TEM studies revealed that these are single domain the in-plane orientation relationship SrRuO3[001]//SrTiO3[010] SrRuO3[1̄10]//SrTiO3[100]. This result is in contrast to previous exactly SrTiO3, which composed two types [110] domains nearly same volume...

Hydroxyapatite (HA) coatings can be deposited using a hybrid process of plasma electrolysis and electrophoresis, called plasma-assisted electrophoretic deposition (PEPD). HA aqueous suspensions with various pH values were prepared modified ultrasonic cleaning bath as an agitator/stirrer. Both DC unbalanced AC power supplies used to bias the titanium alloy substrate materials employed in this work. Scanning electron microscopy (SEM), transmission (TEM), X-ray diffractometry (XRD), Fourier...

Ferroelectric (Pb,Sr)TiO3 (PSTO) thin films were epitaxially grown on (001) LaAlO3 (LAO) by using pulsed laser deposition. Microstructural characterizations with x-ray diffraction and transmission electron microscopy indicate that the as-grown have excellent single crystalline quality a (001)PSTO∕∕(001)LAO [100] PSTO∕∕ LAO interface relationship. Dielectric property measurements reveal as-grow very high dielectric constant value of 3100 large tunability 48% at 40V∕cm room temperature. These...

We report growth of self-organized In0.4Ga0.6As quantum dots on Si substrates by molecular-beam epitaxy. Low-temperature (17 K) photoluminescence spectra show that the optical properties grown are comparable to GaAs substrates. also present preliminary characteristics quantum-dot lasers Light versus current measurements at 80 K under pulsed bias conditions Ith=3.85 kA/cm2. The lasing spectral output has a peak emission wavelength 1.013 μm and linewidth (full width half maximum) ∼4 Å threshold.

Adsorption-controlled conditions have been identified and utilized to grow epitaxial bismuth titanate thin films by reactive molecular beam epitaxy. Growth of stoichiometric, phase pure, c-axis oriented, is achieved supplying a large overabundance ozone continuously the surface depositing film. Titanium supplied film in form shuttered bursts each containing three monolayer dose titanium one formula unit Bi4Ti3O12. It seen from measured thickness, Rutherford backscattering spectrometry...

Single-crystalline perovskite LaBaCo2O5.5+δ thin films were grown on a (110) NdGaO3 single-crystal substrate in order to systematically investigate the effect of lattice mismatch electrical transport properties comparison LaAlO3, SrTiO3, and MgO substrates. Microstructure studies reveal that all are excellent quality with atomically sharp interface structures. The magnetic property indicate resistivity, magnetoresistance, moment film very sensitive materials because mismatch/interface...

Highly epitaxial LaBaCo2O5.5+δ (LBCO) thin films were grown on different miscut (001) SrTiO3 substrates (miscut angle of 0.5°, 3.0°, and 5.0°) to study the substrate surface step terrace effect in-plane electrical transport properties. The microstructure studies by X-ray diffraction transmission electron microscopy indicate that as-grown are A-site disordered cubic perovskite structures with c-axis highly oriented along film growth direction. four-probe scanning tunneling (STM) show LBCO...

Ba 0.6 Sr 0.4 TiO 3 thin films were epitaxially grown on (001) MgO substrates using pulsed laser ablation. Cross-sectional and plan-view transmission electron microscopy have been employed to study the microstructures interface behavior of as-grown films. The 110-nm-thick Ba0.6Sr0.4TiO3 a flat surface sharp interface. entire film has single-crystal cubic structure with an relationship (001)Ba0.6Sr0.4TiO3//(001)MgO 〈100〉Ba0.6Sr0.4TiO3//〈100〉MgO respect substrate. 6.4% lattice mismatch between...

Ferroelectric Pb0.35Sr0.65TiO3 (PSTO) thin films were grown on (001) MgO by using pulsed laser deposition. Microstructure studies from x-ray diffraction and electron microscopy indicate that the as-grown PSTO have excellent single crystal quality good epitaxial behavior with their c-axis oriented perpendicular to plane of films. The interface relationships between determined be [100]PSTO∕∕[100]MgO (001)PSTO∕∕(001)MgO. high frequency dielectric property measurements (up 20 GHz) reveal a...

The (LaBa)Co2O5+δ thin films were grown on (001) SrTiO3 single crystal substrates by using pulsed laser deposition. Microstructure studies from x-ray diffraction and electron microscopy show that the have good epitaxial quality with a-axis orientation sharp atomic interface. Transport property isothermal magnetoresistance measurements been used to understand physical properties of anomalous magnetic phenomena largest reported value 19% at 40 K.

ZnO films embedded with Ag nanoparticles are deposited at 750 °C a reactive radio-frequency magnetron sputtering. The found to have large enhancement in the intensity of photoluminescence emission and extinction incident light. is assigned be from interaction between localized surface plasmons nanoparticels can excited wide range, ultraviolet near infrared wavelength

Metallic oxide films of SrRuO3 deposited on (001) SrTiO3 by pulsed laser deposition have been investigated transmission electron microscopy (TEM) techniques. These a single crystalline structure with an extremely smooth surface. A TEM study cross-sectional samples shows that the film grew epitaxially surface substrate. The along [110] directions in-plane orientation relationship either SrRuO3[1̄10]//SrTiO3 [100] and SrRuO3[001]//SrTiO3[010], or SrRuO3[11̄0]//SrTiO3[010] SrRuO3[001]//SrTiO3...

The domain microstructure in an epitaxial thin film of Bi4Ti3O12 on a SrTiO3(001) substrate is studied by second harmonic generation measurements. input polarization dependence the signal exhibits spatial symmetries that reflect presence eight different variants present film. A theoretical model presented explains observed and extracts quantitative information nonlinear optical coefficients material statistics area being probed. following ratios birefringence was determined:...