Materials Literature
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The knowledge of chemical and magnetic conditions at the Co40Fe40B20 / MgO interface is important to interpret the strong annealing temperature dependence of tunnel magnetoresistance of Co-Fe-B / MgO / Co-Fe-B magnetic tunnel junctions, which increases with annealing temperature from 20% after annealing at 200C up to…
The General Thermodynamic Theory of Sintering, formulated by the author in 1998 is given. This theory is applied to the problem of swelling of materials under conditions of radiation. Driving forces, caused by the presence of the evolution of heat in the volume of a sample (electric contact, hf, inductive heating or p…
Recent neutron scattering measurements reveal spin and charge ordering in the half-doped nickelate, ${\mathrm{La}}_{3∕2}{\mathrm{Sr}}_{1∕2}{\mathrm{NiO}}_{4}$. Many of the features of the magnetic excitations have been explained in terms of the spin waves of diagonal stripes with a magnetic coupling structure which is…
The different mechanisms involved in the alloying of epitaxial nanocrystals are reported in this letter. Intermixing during growth, surface diffusion and intra-island diffusion were investigated by varying the growth conditions and annealing environments during chemical vapor deposition. The relative importance of eac…
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCalcium Carbonate Formation and DissolutionJohn W. Morse, Rolf S. Arvidson, and Andreas LüttgeView Author Information Department of Oceanography, MS-3146, Texas A&M University, College Station, Texas 77843, and Department of Earth Science MS-126, Rice University, 6100 Main S…
pH-gesteuert: Eine Reihe zwölfkerniger Koordinationscluster von NiII und CoII mit isostrukturellen Gerüsten wurde mit zuvor unerreichter Kontrolle über Struktur und Zusammensetzung hergestellt. Je nach pH-Wert lassen sich andere Cluster in Lösung durch Kryospray-Massenspektrometrie nachweisen. Die Anordnung der Metall…
The authors performed resistance switching of a VO2 film grown on the Al2O3 substrate by applying electric pulses. As a consequence, Joule heat of about 1W has been induced in a 15×50μm2 area between the two electrodes. Using synchrotron-based infrared microspectroscopy, the authors mapped the propagation of Joule hea…
Abstract Three new chromophores containing an electron‐donating dithiafulvene (DTF) unit attached to derivatives of retinal, diethynylethene (DEE), and dihydroazulene (DHA), respectively, are synthesized and characterized by using X‐ray crystallography as well as absorption and fluorescence spectroscopy. In general, t…
The intensity change upon crystal rotation of selected Raman modes of a lead-zirconate-titanate-based relaxor has been examined from both theoretical and experimental viewpoints. Periodic functions, representing intensity ratios between Raman bands as a function of crystal orientation, have been theoretically derived…
Viewing angle switching from a wide viewing angle to a narrow viewing angle has been studied. Conventional multidomain vertical alignment (VA) mode offers the advantages of a high contrast ratio (CR) not only in the front view but also in the wide viewing directions only if compensation films such as a negative C plat…
Specific-heat measurements are reported near the Curie temperature (TC=320K) on triglycine sulfate. Measurements were made on crystals whose surfaces were either nongrounded or short circuited, and were carried out in magnetic fields up to 9T and electric fields up to 220V∕cm. In nongrounded crystals the authors find…
The interface of epitaxial (Pb0.35Sr0.65)TiO3 films on MgO substrates grown by pulsed laser ablation was studied using transmission electron microscopy (TEM). Cross-section TEM studies revealed that the epitaxial films have a lattice mismatch of −6.2% with respect to the substrates. Electron diffraction pattern and hi…
Significant differences in the luminescence properties of dibenzoylmethanate and ditoluylmethanate of boron difluoride bulk crystals and microcrystals were detected. The size-dependent blue-to-green colour change of the luminescence is connected with the band intensity redistribution of monomer and excimer luminescenc…
Homogeneous MnxGe1−x ferromagnetic semiconductor films with high Mn concentration were prepared, contrasting with dilute inhomogeneous MnxGe1−x magnetic semiconductors. The saturation magnetization of Mn0.57Ge0.43 films is high, up to 327emu∕cm3 (1.04μB∕Mn) at 5K, and the Curie temperature is about 213K. The Mn0.57Ge0…
Visible blue-green light emission metastable γ-Ga2O3 quantum dots were prepared, and the light emission is clearly visible to the naked eyes. The UV-visible spectra present a blueshift phenomenon of the absorption edge as the particle sizes decrease; the fitted result of UV-visible data by Tauc function shows that the…
Ring a ring of benzenes: An unsubstituted N-confused metalloporphyrin forms both C3- and C1-symmetric trimers in solution, whereas its monophenyl-substituted analogue forms exclusively C3-symmetric trimers (see picture) owing to significant stabilizing noncovalent interactions between the three phenyl groups, as evalu…
The amyloid-like fibril is a biomolecular nanowire template of very high stability. Here we describe the coordination of a conjugated polyelectrolyte, poly(thiophene acetic acid) (PTAA), to bovine insulin fibrils with widths of <10 nm and lengths of up to more than 10 microm. Fibrils complexed with PTAA are aligned on…
The authors report on an interaction between chalcogenide phase-change material Ge2Sb2Te5 and a thin Ti adhesion layer considered for integration into a structure of a memory cell. Segregation of Te atoms in the chalcogenide film to the interface drives an interaction between Ti and Te atoms and formation of Ti–Te bin…
In this investigation, Cu/dielectric-cap interface and Cu/cap/liner edge were studied in detail to identify the dominant path in electromigration stressed via-fed test structures that represent the dual damascene architectures in Cu metallization. The impact of the electron wind force on void evolution, agglomeration…