# Central European Journal of Physics

Central European Journal of Physics > 2012 > 10 > 1 > 197-205

_{2}compound in the AlB

_{2}(space group: P6/mmm) and the omega trigonal (space group: P-3m1) type structures are investigated using the methods of density functional theory within the generalized gradient approximation (GGA). The thermodynamic properties of the considered structures are obtained through the quasi-harmonic Debye model. The...

Central European Journal of Physics > 2012 > 10 > 1 > 96-101

Central European Journal of Physics > 2012 > 10 > 1 > 40-46

*λ*= 1, using the third-order WKB approximation. Our results show that when the scalar field mass increases, the oscillation frequency increases while the damping decreases. And we find that the imaginary parts are almost linearly related to the real parts, the behaviors...

Central European Journal of Physics > 2012 > 10 > 1 > 181-188

Central European Journal of Physics > 2012 > 10 > 1 > 232-238

Central European Journal of Physics > 2012 > 10 > 1 > 116-123

Central European Journal of Physics > 2012 > 10 > 1 > 140-144

*Q*and the resonant modes of a miniaturized resonant cavity filled with metamaterial are the same as for those in the original space. Theoretical analysis and...

Central European Journal of Physics > 2012 > 10 > 1 > 86-95

_{ x }, which can approximately be described as a second-order phase transition. We show that the fluctuations of the order parameter correspond to fluctuations both of the density of H...

Central European Journal of Physics > 2012 > 10 > 1 > 109-115

^{6}He+

^{208}Pb and the

^{6}He+

^{197}Au systems at the laboratory energy of

*E*

_{lab}=27 MeV within the framework of the McIntyre parametrization, and systematically investigate

*χ*

^{2}/

*N*analysis of both systems to obtain an excellent agreement between the theoretical results and the experimental data. We find large diffusivity parameters indicating long range absorption mechanisms...

Central European Journal of Physics > 2012 > 10 > 1 > 61-65

Central European Journal of Physics > 2012 > 10 > 1 > 132-139

Central European Journal of Physics > 2012 > 10 > 1 > 102-108

Central European Journal of Physics > 2012 > 10 > 1 > 206-209

_{3}AsS

_{3})

_{ x }(As

_{2}S

_{3})

_{1−x }chalcogenide superionic glasses in the compositional range

*x*= 0.3–0.9 were performed by scanning electron microscopy. Temperature and compositional dependences of transmission coefficient, electrical conductivity, and activation energy were investigated

Central European Journal of Physics > 2012 > 10 > 1 > 47-50

Central European Journal of Physics > 2012 > 10 > 1 > 189-196

_{1−x }Al

_{ x }B

_{2}were obtained by two-step ceramic synthesis. All compounds were characterized by X-ray diffraction, NMR spectroscopy, and by four point probe resistivity measurements in various magnetic fields method. The diborides unit cell parameters were determined as a function of the Al mole fraction. With the vaues of

*x*up to 0.40 (where

*x*is the composition...

Central European Journal of Physics > 2012 > 10 > 1 > 76-85

*n*th-order fuzzy linear differential equations with fuzzy initial conditions. This method is illustrated by solving several examples.

Central European Journal of Physics > 2012 > 10 > 1 > 225-231

Central European Journal of Physics > 2012 > 10 > 1 > 159-165

_{3}O

_{4}nanoparticles caused by applied DC magnetic field. Two types of variations can be distinguished. Fast response takes less than 1ms while slow variations occur at the time interval fromseconds to hundreds of minutes. Possible mechanisms of these variations are discussed. Formation of chain-like...

Central European Journal of Physics > 2012 > 10 > 1 > 239-252

_{3}materials (BaTiO

_{3}, KNbO

_{3}, LiTaO

_{3}and LiNbO

_{3}) are studied by density functional theory (DFT) in the local density approximation (LDA) expressions based on first-principle calculations. Our goals are to give the details of the calculations for linear and nonlinear optical properties, including the linear electro-optic (EO) tensor for some ABO

_{3}structures...

Central European Journal of Physics > 2012 > 10 > 1 > 124-131

*g*-factors, and lifetimes for

*nd*(

*n*= 5–25),

*ns*(

*n*= 6–24),

*ng*(

*n*= 5–25),

*nf*(

*n*= 4–22), and

*np*(

*n*= 6–25) excited levels of doubly ionized lanthanum (La III, Z = 57). We compared the results with previously reported calculations and experiments.