Materials Literature
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Low-dielectric-constant amorphous fluorinated carbon (a-C:F) films were prepared using plasma-enhanced chemical vapor deposition (PECVD) from C 4 F 6 (hexafluoro-1,3-butadiene) gas, which is expected to be a substitutional gas owing to its low global warming potential (GWP). Kinetic analysis revealed that the density…
International Laboratory of High Magnetic Fields and Low Temperatures, Wroclaw, Poland is financed by the Bulgarian Academy of Sciences, National Academy of Sciences of Ukraine, Polish Academy of Sciences and Russian Academy of Sciences as the main contributors. But the scientists from Germany, UK and other countries…
The magnetic and magnetoelastic properties of single crystals of electron-doped rare-earth manganites La1−x Sr x MnO3 are studied. Phase transitions from the A-type antiferromagnetic phase to the C-type anti-ferromagnetic phase in a strong magnetic field are revealed in La1−x Sr x MnO3 manganites with a strontium cont…
We report the Raman, continuous-wave (CW), and time-resolved photoluminescence (PL) measurements in a series of multilayer Si/Si1-xGexsamples with an island-like morphology and precise control over the chemical composition in the range of 0.096 les x les 0.61. In the samples with x continuously increasing from 0.096 t…
Sr2-xBaxBi4Ti5O18 (SBBTi-x,x = 0∼2.0) ceramic samples were prepared by using the standard solid-state reaction method and their crystal structure, ferroelectric and dielectric properties were examined. The results show that the lattice constants increase with barium content. The remnant polarization (2P r ) and the co…
Concrete walls play the role not only of the structural material but also of the final barrier of a multiconfinement system of tritium in a fusion reactor or a tritium-handling facility. Therefore, it is required that the behavior of tritium in the concrete materials be clarified to certify the radiation safety of a f…
The processing of SmCo5 sintered magnets involves a post-sintering heat treatment, where the intrinsic coercivity of the magnets may increase more than one order of magnitude. Variables of the heat treatment like time, temperature and cooling rate have strong influence on coercivity. We describe a method for modeling…
The heat capacity C p of a biocarbon template based on white eucalyptus wood is measured at a constant pressure in the temperature range T = 3.5–300 K. The phonon mean free path l for a white-eucalyptus biocarbon template is calculated from the measured dependence C p (T) and data available in the literature on the ph…
Initial nucleation and growth of Cu thin films on a Ta substrate via chemical vapor deposition (Cu-CVD) for ultra large scale integration (ULSI) interconnects is monitored in situ by irradiating the substrate surface with 635-nm-wavelength laser light and then measuring the change in reflected-light intensity. The eff…
The specific conductivity logσ T and thermal electromotive force coefficient Q T of perovskite-like lanthanum cobaltite were measured over the temperature range 1173 K ≤ T ≤ 1323 K depending on the partial pressure of oxygen (10−8 atm ≤ p O 2 ≤ 1 atm). The p O 2-T-δ phase diagram of solid LaCoO3-δ studied earlier was…
Seven systems of more than 60 compounds with possible inhibiting properties are investigated. Several methods are used: electrochemical, gravimetric, XPS, and SEM analyses. The inhibition efficiency Z is related to the chemical structure of inhibitors (sequences of compounds with regard to Z are found), their electron…
In this paper, we report novel (TE-free) FRAM capacitors using reliable PZT CMP process in order to improve ferroelectric properties and enhance mass productivity by simplifying integration of processes. FRAM capacitors were prepared using a PZT film for a stopping layer in ILD CMP using a high selective slurry having…
Beta titanium alloys, e.g., are now the main target for medical materials. Ti-35Nb-7Zr- 5Ta alloy were manufactured by blended elemental (BE) powder method, which appears to be one of the most promising technique for titanium parts production at reduced cost. The process employs hydrided powders as raw materials with…
Abstract The effects of a low frequency electromagnetic field applied during semi-continuous direct-chill casting on AZ80 ingots were investigated. The experiments were performed both in the absence and in the presence of the electromagnetic field. In contrast to the ingot cast in the conventional process, the microst…
An investigation into the spectroscopic analysis of cotton waxes on Australian cottons was undertaken. The chemical composition of cotton wax is complex and contains a number of lipid classes. Infrared transmission spectroscopy coupled with principal component analysis was found to be capable of discriminating between…
For some microelectromechanical system (MEMS) applications, the conditions of operation, high temperature, high stress, etc., can be very severe. Under these conditions the piezoelectric performance of polar material can decrease due to a partial (or a total) depoling induced by external excitations. So, it is importa…
Abstract Pale yellow single crystals of Sm 2 (SeO 3 )(Se 2 O 5 ) 2 (monoclinic, P 2 1 / c , Z = 4, a = 1003.6(2), b = 1022.5(2), c = 1287.3(2) pm, β = 112.3(2)°) were obtained from the reaction of Sm 2 O 3 and SeO 2 at 350 °C in a sealed glass ampoule. In the crystal structure both Se 2 O 5 2− and SeO 3 2− groups conn…
Frequency dependence of dielectric constant and coercive field are investigated for PbZr0.4Ti0.6O3 (PZT) capacitors. The calculations base on the in-series capacitor model show that the dielectric constant followe an universal-law dependence with various bias, which could be interpreted by constant phase model. The co…
The crystal structure of rubidium oxalate monohydrate, Rb 2 (C 2 O 4 ) · H 2 O, has been refined using an imaging-plate diffractometer system and graphite-monochromatized Mo K α radiation. The complex crystallizes in the monoclinic system, space group C 2/ c , with unit cell dimensions of a = 9.617(6), b = 6.353(5), c…
Abstract The recent development of the method for analyzing repassivation rate by a rapid scratch test and high field conduction model makes it possible to predict SCC susceptibility more quantitatively but it is impossible to distinguish the repassivation rates with a little difference due to the inaccurate measureme…