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Spin glass formation in Li-substituted Co2TiO4 spinel
(Journal of Physics: Condensed Matter, 2004)
DC magnetization and AC susceptibility measurements point to the formation of a spin glass state in the ternary spinel-type compounds Li1.33xCo2-2xTi1+0.67xO4. The dynamics of spin freezing was analysed with both the ...
Influence of anisotropy of Compton scattering on low energy x-ray reflection
(Journal of Physics. D: Applied Physics, 2004)
The reflection of x-rays from a semi-infinite water target, for energies ranging from 10 to 60 keV, often used in x-ray diagnostics, is investigated by Monte Carlo simulation. The same process was also treated analytically ...
Thermal diffusivity measurements of thermographite
(International Journal of Thermophysics, 2004)
This paper presents results of measurements of a graphite proposed to serve as a thermophysical property reference or standard reference material. The reported measurements contribute to a program launched in 1999 by Anter ...
Structural and mechanical characteristics of ZA27-7 wt.% SiC composites produced by powder metallurgy techniques
(Zeitschrift fur Metallkunde, 2004)
This paper describes a study of the structural and mechanical properties of Zn-matrix composites discontinuously reinforced by 7 wt.% SiC particles of size 0.7 mum. Commercial Zn-rich Zn-Al-Cu. (ZA27) alloy was gas atomized, ...
Electronic structure of the substitutional versus interstitial manganese in GaN
(Physical Review B: Condensed Matter and Materials Physics, 2004)
Density-functional studies of the electron states in the dilute magnetic semiconductor GaN:Mn reveal major differences for the case of the Mn impurity at the substitutional site (Mn-Ga) versus the interstitial site (Mn-I). ...
Role of excess electrons in TiO2 nanoparticles coated with Pt in reduction reactions studied in radiolysis of aqueous solutions
(Journal of Physical Chemistry. Part B: Condensed Matter, Materials, Surfaces, Interfaces and Biophysical, 2004)
Surface modification of TiO2 nanocrystallites in aqueous solution was carried out by reduction of chloroplatinic acid with TiO2 electrons (e(TiO2)(-)). The TiO2 electrons had been generated through electron injection from ...
Age-related changes of insulin receptors, plasma insulin and glucose level
(Biogerontology, 2004)
The effects of aging on hepatic and erythrocyte insulin receptors have been investigated in 6, 12, 18 and 21-months-old compare to 3-months-old rats. Plasma insulin was elevated in 6, 12 and 18-months-old rats. Specific ...
Cation distribution and size-strain microstructure analysis in ultrarine Zn-Mn ferrites obtained from acetylacetonato complexes
(Journal of Physical Chemistry. Part B: Condensed Matter, Materials, Surfaces, Interfaces and Biophysical, 2004)
The ultrafine ZnFe2O4, MnFe2O4, and cation deficit Zn-Mn ferrites were obtained by thermal decomposition of appropriate mixed complex compounds with acetylacetone (2,4-pentadione) ligands ([M(AA),]) at 500 degreesC. In ...
A study of misleading effects of HCl treatment in the characterization of sulfur in coal
(Energy and Fuels, 2004)
The purpose of this study was to determine the cause of the experimentally noticed decrease of sulfate sulfur during a thermal treatment of coal. In the case of the pyrolysis of the investigated six coals of different rank ...
Optical and electron paramagnetic resonance spectroscopy of Cd1-xMnxS quantum dots
(Journal of Physics: Condensed Matter, 2004)
Cd1-xMnxS quantum dots (QDs) with diameter d less than or equal to 4.5 nm and with manganese concentrations from x = 0.001 to 0.15 have been prepared using aqueous solution precipitation. Absorption and fluorescence spectra ...