Calcium barium niobate as a functional material for broadband optical frequency conversion.

We demonstrate the application of as-grown calcium barium niobate (CBN) crystal with random-sized ferroelectric domains as a broadband frequency converter. The frequency conversion process is similar to broadband harmonic generation in commonly used strontium barium niobate (SBN) crystal, but results in higher conversion efficiency reflecting a larger effective nonlinear coefficient of the CBN crystal. We also analyzed the polarization properties of the emitted radiation and determined the ratio of d32 and d33 components of the second-order susceptibility tensor of the CBN crystal.

SBN60, strontium-barium niobate at 100 K.

The title compound, Sr0.6Ba0.4Nb2O6 (strontium barium niobium oxide), belongs to the group of strontium-barium niobates with varying composition of Sr and Ba.

Vibrational properties of RbNd(WO4)2: high pressure Raman study, structural and phonon calculations.

RbNd(WO(4))(2) was investigated by high pressure Raman spectroscopy in the 0.1-12.3 GPa pressure interval.

Effect of U on the electronic properties of neodymium gallate (NdGaO3): theoretical and experimental studies.

We have performed a density functional calculation for the centrosymmetric neodymium gallate using a full-potential linear augmented plane wave method with the LDA and LDA+U exchange correlation. In particular, we explored the influence of U on the band dispersion and optical transitions. Our calculations show that U = 0.

[Newborn of a mother with HELLP syndrome].

HELLP syndrome is a serious complication of pregnancy with characteristic appearances between 22 to 26 weeks of gestation. Clinical classification in three groups, is based on platelet count. Early diagnosis and appropriate management allow women to achieve a mortality rate below 1%.