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We report our study on the magnetic properties of -doped thin films fabricated by pulsed laser deposition technique. The -doped thin films show ferromagnetism at room temperature. The saturation magnetism increases from 0 to 2.4 emu/cc with the increasing of concentration up to 2%, and then decreases with further increasing of concentration. First-principles calculation demonstrates that the origination of ferromagnetism for -doped system is the two unpaired electrons of -2p. These unpaired electrons increase the magnetic moments which are responsible for the increasing ferromagnetism. [ABSTRACT FROM AUTHOR]

Both ferroelectric Na0.5Bi0.5TiO3 (NBT) and K0.5Bi0.5TiO3 (KBT) are considered as the best known lead-free materials. In this experiment, we prepared NBT and KBT thin films on Pt/TiO2/SiO2/Si substrates by metalorganic solution deposition. The structural properties and surface morphologies were measured using X-ray diffraction and atomic force microscopy. The NBT and KBT films show higher leakage currents due to the oxygen vacancies in the films. The remanent polarization and coercive field of NBT (KBT) thin film are 9 (5.2) μC/cm2 and 50 (25) kV/cm at an applied electric field of 150 kV/cm. The relative dielectric constants of NBT and KBT are 340 and 316 at 1 MHz, respectively. [ABSTRACT FROM AUTHOR]

A novel dmit2- salt: (hexadecyltrimethylammonium)bis(4,5-dithiolato-1,3-dithiole-2-thione)copper, abbreviated as HTCu, is synthesized and characterized for third-order optical nonlinearity by Z-scan technique at a wavelength of 1064 nm with laser duration of 30 ps. Z-scan spectra reveal a negative Kerr coefficient at 1064 nm and no nonlinear absorption was observed under this condition. The nonlinear refraction coefficient n2 and the second hyperpolarizability γ have been determined to be -1.51 × 10-11 and 1.36 × 10-30esu, respectively, suggesting HTCu is a promising material for all-optical switching. [ABSTRACT FROM AUTHOR]