Mg, Fe co-doped near-stoichiometric lithium tantalite (SLT) single crystals were grown by employing the zone-leveling Czochralski (ZLCz) technique. The optical properties, holographic parameters, as well as the composition of the grown crystals were measured. It was found that the Li/Ta ratio decreased with the doping of Mg and Fe ions. A red shift was observed in absorption spectrum for the Mg...

The crystal structure of the title compound, α-PbTeO(3) (PTO), has been reported previously by Mariolacos [Anz. Oesterr. Akad. Wiss. Math. Naturwiss. Kl. (1969), 106, 128-130], refined on powder data. The current determination at room temperature from data obtained from single crystals grown by the Czochralski method shows a significant improvement in the precision of the geometric parameters w...

An efficient antireflection coating is critical for the improvement of silicon solar cell performance via increased light coupling. Here, we have grown well-aligned ZnO nanowhisker (NW) arrays on Czochralski silicon solar cells by a seeding-growth two-step process. It is found that the ZnO NWs have a great effect on the macroscopic antireflection effect and, therefore, improves the solar cell p...

Solar cells manufactured on boron-doped Czochralski-grown silicon (Cz-Si) degrade in performance when exposed to light or minority carriers are injected in the dark until a stable efficiency is reached. This effect, which is now known for almost 30 years, is due to the activation of a specific metastable defect in the Cz-Si material. Although a conclusive explanation of the effect is still to b...

Barium strontium sodium niobate (Sr0.7Ba0.3)2NaNb5O15 (SBNN70) crystals were grown by the Czochralski method. X-ray energy dispersive spectrometry showed that SBNN70 crystals have a stoichiometric composition nearly identical to the starting materials. X-ray diffraction of crushed powder indicated that the SBNN70 crystals are orthorhombic with a = 1.2748 nm, b = 1.1402 nm and c = 0.3898 nm. The...

We have prepared single crystals of PrCr2Si2C and NdCr2Si2C by Czochralski technique and investigated them by heat capacity and magnetization measurements in the temperature range 2–300 K and magnetic fields up to 6 T applied parallel to the principal crystallographic axes. Both compounds exhibit the strong magnetocrystalline anisotropy with the tetragonal c-axis as the easy direction of magnet...