Ultrasonic investigations of hydrogels containing barium ferrite particles

Article Abstract:

A study is conducted to establish a systematic and accurate method for evaluating the sound velocity of polymer gels containing magnetic particles using 2.25- and 10-MHz ultrasoni c waves at 295.5 K. the observed anisotropy in the modulus at these frequencies would be ascribed to the magnetic interaction between magnetic particles in the range of ~100 (mu)m.

Polymers, Ultrasonic waves, Properties, Ultrasound

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DFT study on ferroelectricity of BaTiO3

Article Abstract:

The plane-wave pseudopotential method and the LCAO quantum chemical approach in the framework of density functional theory (DFT) are used to investigate the ferroelectricity of BaTiO3. The DFT calculations show a lattice constant of 3.99 Armstrong and dielectric constant of 5.74 for the cubic BaTiO3.

Electric properties, Titanium dioxide, Density functionals, Density-functional theory

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Synthesis and optical characterization of aluminum nitride nanobelts

Article Abstract:

The synthesization of aluminum nitride nanobelts is studied. The optical characterization indicates that the vibration modes of the AIN nanobelt agrees with the AIN film despite its nanobelt geometry.

Analysis, Optical properties, Optics, Structure, Optical research, Aluminum nitride

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