The study of the oxygen incorporation and diffusion in lanthanum manganite thin films is presented by means novel isotope-exchange atom probe tomography, allowing a direct quantification enhancement grain boundaries' kinetics.

This paper describes some physical, structural, and biological properties of gypsum bioceramics doped with various amounts of strontium ions (0.19-2.23 wt%) and compares these properties with those of a pure gypsum as control. Strontium-doped gypsum (gypsum:Sr) was obtained by mixing calcium sulfate hemihydrate powder and solutions of strontium nitrate followed by washing the specimens with dis...

We report on the first Kerr-lens mode-locked laser based Yb 3+ -doped disordered strontium lanthanum aluminate crystal, Yb:SrLaAlO 4 (Yb:SALLO), pumped by a high-brightness fiber at 976 nm. Nearly Fourier-limited pulses as short 44 fs were achieved 1051 nm with an average output power of 277 mW and pulse repetition rate ?66 MHz via soft-aperture mode-locking. A higher 459 mW, corresponding to o...

We present results of local spin density approximation (LSDA) pseudopotential calculations for the perovskite structure oxide, bismuth manganite (BiMnO3). The origin of the differences between bismuth manganite and other perovskite manganites is determined by first calculating total energies and band structures of the high symmetry cubic phase, then sequentially lowering the magnetic and struct...

The thermoelectric properties of lanthanum-doped polycrystalline perovskite-type europium titanate were measured from room temperature to 900K and compared to those of MTiO3 (M 1⁄4 Ca, Sr, Ba). The differences in the titanates were calculated in terms of the differences of A-site ion and Ti–O distance that determined the covalent bonding strength. The A-site ion appeared to have little influenc...

Based on the data of thermogravimetric analysis values oxygen index (3–δ) in manganite La 0.7 Sr 0.3 Mn 0.9 Fe 0.1 O 3-δ composition, obtained by solid-phase reaction technique, have been calculated. The sorption-desorption curves showed that processes release and absorption at p 2 = 10 Pa 400 are not reversible. minima derivative dδ/d t f ( T ) corresponding to maxima extraction rate indicate ...

We present the diode pumping of a Nd-doped strontium and lanthanum (Nd:ASL) crystal Sr1-xLax-yNdyMgxAl12-xO19 (0.05 ≤ x ≤ 0.5; y = 0.05) for second harmonic generation around 450 nm. In order to fulfill the pumping requirements of this crystal, we have developed a high-brightness pump source based on a tapered amplifier in an extended cavity with a volume Bragg grating for wavelength stabilizat...

This study was conducted to investigate the use of cubic LaMnO3 nano-perovskite as a green catalyst for the degradation of an aqueous solution of methyl orange under different conditions. Nanoscale cubic lanthanum manganite with the particle size of ~20 nm was successfully synthesized via citrate sol-gel method. The sample was characterized using the FT-IR and UV-Vis spectroscopy, XRD, SEM, and...