Materials Literature
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The mean field method was used to study zones and Fermi surfaces of the stripe phases of the Hubbard model, which describes the electronic properties of cuprates. It was shown for structures with stripes parallel to bonds that the Fermi surface consisted of open surface segments and closed surfaces around hole pockets…
Ferroelectric properties of Lead-free (Bi,La)4Ti3O12 (BLT) films were evaluated on the newly developed MTP (Merged Top-electrode and Plate-line) cell structure. The BLT film was deposited by pulsed-DC sputtering method on a buried Pt/IrOx/Ir bottom electrode stack with W-plug. The BLT composition in the sintered sputt…
The thermodynamics of the matrix stabilization effect is considered using the concept of isomorphous miscibility. The influence of defects and nonequilibrium on the matrix stabilization is discussed. The existing thermodynamic interpretation of the nature of the matrix stabilization effect is demonstrated not to be pe…
The stress-strain state in the vicinity of an irregular point of the boundary of a planar region crossed by a finite discontinuity (jump) of forced deformations is analyzed theoretically and experimentally. A formula proposed for extrapolation of experimental data makes it possible to retrieve the fringe orders in the…
The problem of the analysis of low temperature magnetization is exposed in detail. The application of exact Bose representation of spin operators to the bulk ferromagnets is justified. By means of this representation the magnetization of ultrathin films was analysed. It turned out that thin films magne-tization contai…
Recently novel nonlinear optical phenomenon, optical orientation of dipolar centers (OODC), was firstly predicted theoretically and then found experimentally. From the phenomenological point of view the OODC-effect can be considered as a kind of optical rectification and consequently observed in any noncentrosymmetric…
Accumulative Roll Bonding (ARB) is a severe plastic deformation technique for producing ultra-fine grain structures in sheet metal. In this investigation, the through-thickness shear strain distribution during single pass rolling of roll-bonded aluminium sheets was monitored via the deflection of an embedded scratch o…
Es werden zwei Typen von intrazellulären Gd-DOTA (1,4,7,10- tetraazacyclododecane-1,4,7,10-tetraacetic acid)-Kontrastmitteln vorgestellt, deren Aufnahme in die Tumorzelle auf zwei verschiedenen Mechanismen beruht. Zum einen werden die DOTA-Komplexe an spezielle Liganden für Tumoroberflächenrezeptoren (z.B. Maiglöckche…
Radon isotopes (222, 220, 219) are radioactive gases produced by the disintegration of radium isotopes 226, 224 and 223, which are decay products of uranium238, thorium232 and uranium235 respectively. All are found in the earth’s crust. Solid elements, also radioactive, are produced by radon disintegration. Radon is c…
Abstract Für Festkörper mit einer räumlichen Ausdehnung von wenigen Nanometern ergeben sich oft eindeutige Zusammenhänge zwischen Festkörpergestalt und bestimmten physikalischen und chemischen Eigenschaften, die hinsichtlich der Verwendung von Nanomaterialien als Funktionswerkstoffe von Bedeutung sein können. In diese…
The spectral properties of magnetostatic waves in a ferromagnet with a moving periodic domain structure are studied within the exchange-free magnetostatic approximation. It is demonstrated that the Doppler frequency shift caused by the domain-wall motion results in the splitting of the spectrum of each magnetostatic w…
The in vitro attachment, spread, and proliferation behavior of osteoblast cells on the plasma-sprayed composite coating with 70wt% zirconia and 30wt% dicalcium silicate were studied. The composite coating shows good cytocompatibility. The human osteoblast cells attached, spread and proliferate well on the surface. The…
Electronic and magnetic properties of GaSb/Mn and GaAs/Mn digital heterostructures were studied using the augmented plane wave method. The calculated electronic structures of GaSb/Mn and GaAs/Mn are similar. A pre-edge absorption line at 6541 eV should be observed in Mn K-edge x-ray absorption spectra of the heterostr…
US boat builder Hodgdon Yachts employed thermoformed core material and a cold moulding infusion process to construct its new 65’ carbon composite yacht. Matthew Bodoff, SP Technical Sales Representative, reports.
Ziele: Ziel dieser Studie war der Vergleich zwischen der kontrastverstärkten MR-Koronarangiographie bei 3T mit Gadofosveset und der nativen SSFP MR-Koronarangiographie bei 1,5T. Methode: Eine prospektive randomisierte Studie wurde mit 20 gesunden männlichen Probanden durchgeführt. Die Probanden wurden zweimal untersuc…
In this PhD thesis the electronic structure of a range of actinide compounds has been investigated using density functional theory. The reason for using DFT instead of other methods is mainly due to the size of the compounds which makes multireference calculations prohibitively expensive, but also to make comparisons…
In this study, CuInS₂ powders have been synthesized using polyol process of a mixture of copper nitrate, indium nitrate, and thiourea with various stoichiometric molar ratios in ethylene glycol at 196℃. As boiling time goes by, the color of metal ion mixed solutions were changed transparent green to dark green and fin…
Characterized by zigzag and armchair boundaries, the narrow ribbons display the very different characteristics in Hall conductivities. It is shown that the multi-band-crossings occur in the energy spectrum for armchair ribbons, and the number of them depends on the width of ribbons. Theoretically, it is predicated tha…
In this paper, evaluation of physical properties was made for dielectric relaxation phenomena by the detection of the surface pressures and displacements current on the monolayer films of fatty acid monomolecular Arachidic Acid, Stearic Acid using compressing velocity. LB(Langmuir-Blodgett) thin films were manufacture…
Con el proposito de obtener una aleacion de Ti libre de Ni que posea bajo modulo elastico y/o memoria de forma, el presente trabajo tiene como objetivo la caracterizacion y optimizacion de dos aleaciones del sistema Ti-Nb-Hf-Zr. Ambas aleaciones fueron disenadas mediante un metodo de diseno de orbitales moleculares es…