Materials Literature
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This work reports on the magnetic interlayer coupling between two amorphous CoFeB layers, separated by a thin Ru spacer. We observe an antiferromagnetic coupling which oscillates as a function of the Ru thickness x, with the second antiferromagnetic maximum found for x=1.0 to 1.1 nm. We have studied the switching of a…
Ultra-precision machining of metals, the breaking of nanowires under tensile stress and fracture of nanoscale materials are examples of technologically important processes which are both extremely difficult and costly to investigate experimentally. We describe a multiscale method for the simulation of such systems in…
Uniqueness of effective interaction defined in an extension of the Kohn-Sham theory is proved, if the model with a non-degenerate ground state exists and to reproduce a correlation function as well as the single-particle density of an electron system. The two-body interaction term is regarded as a Hubbard-type short r…
A crystallization screening process is presented that was developed for a small academic laboratory. Its underlying concept is to combine sparse-matrix screening with systematic screening in a minimum number of crystallization conditions. The sparse-matrix screen is the cherry-picked combination of conditions from the…
We investigated the preparation of bulk dense nanocrystalline BaTiO 3 and Ni–Cu–Zn ferrite ceramics using an unconventional two‐step sintering strategy, which offers the advantage of not having grain growth while increasing density from about 75% to above 96%. Using nanosized powders, dense ferrite ceramics with a gra…
Monolayer graphite films, or graphene, have quasiparticle excitations that can be described by (2+1)-dimensional Dirac theory. We demonstrate that this produces an unconventional form of the quantized Hall conductivity sigma(xy) = -(2e2/h)(2n+1) with n = 0, 1, ..., which notably distinguishes graphene from other mater…
The magnetocaloric effect (MCE) is a very important parameter for researching and developing efficient magnetic refrigerators. This paper discusses and compares the characteristics of direct and indirect measurement methods for MCE. A direct measurement setup has been designed and developed for MCE. A magnetic field s…
Small ${(\mathrm{Be}{\mathrm{B}}_{2})}_{n}$ clusters ($n=1--6$ and 8) as well as $\mathrm{Be}{\mathrm{B}}_{2}$ nanotubes and cages ${(\mathrm{Be}{\mathrm{B}}_{2})}_{n}$, with $n=10$, 12, 15, 18, and 30, have been studied using density functional theory. These nanostructures strongly resemble the ones formed by carbon,…
Physical and chemical properties of Sr 9 Fe(PO 4 ) 7 and Sr 9 FeD(PO 4 ) 7 were investigated by Mössbauer, infrared, and Raman spectroscopy, magnetization and dielectric measurements, differential scanning calorimetry, and thermal analysis. Sr 9 Fe(PO 4 ) 7 undergoes an antiferroelectric-paraelectric (AFE-PE) phase tr…
Nanocrystalline CeO 2 as small as 5 nm was successfully prepared by the precipitation method using hydrogen peroxide as an oxidizer. The methane oxidation temperature of this nanocrystalline CeO 2 dropped about 100°C as compared with microcrystalline CeO 2 .
An open capsule-type octanuclear heterometallic sulfide cluster without an intramolecular inversion center [Ru(eta(6)-C(6)Me(6)){P(OMe)(3)}{MoO(mu(3)-S)(3)}(CuI)(2)](2) (5) has been synthesized for the first time by stepwise connection of three mononuclear building blocks, i.e., (i) [RuCl(2)(eta(6)-C(6)Me(6)){P(OMe)(3…
Metal ion complexes of semiquinone radical anions exhibit different types of thermochromism depending on metal ions and quinones. Metal ion complexes of 1,10-phenanthroline-5,6-dione radical anion (PTQ(.-)) produced by the electron-transfer reduction of PTQ by 1,1'-dimethylferrocene (Me(2)Fc) in the presence of metal…
The dynamic dielectric response of epitaxial $\mathrm{Pb}{\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3}{\mathrm{O}}_{3}$ thin films was experimentally studied as a function of amplitude of ac electric field including very large amplitudes (to $10\phantom{\rule{0.3em}{0ex}}\mathrm{MV}∕\mathrm{m}$). For all amplitudes, a typica…
Recently, a myofibril-bound serine proteinase (MBSP) in the skeletal muscle of silver carp was identified. MBSP could be dissociated from myofibrils by treatment at pH 4.0. Following ultrafiltration concentration and chromatography on Sephacryl S-200, High Q ion-exchange and affinity column of Arginine Sepharose-4B, M…
We report completely optimized ONIOM DFT/AM1 molecular orbital calculations on several collagen-like triple helices based upon the repeating triad, ProProGly. The requirement of Gly as every third amino acid in collagen can be attributed to its enantiomorphic nature, as it behaves as a Damino acid in collagen. We, the…
A detailed study on a room temperature magnetic refrigerator using these alloys with a permanent magnet has been carried out. Gd-Si-Ge system alloys were prepared by using the Gd with purity of 99.9 wt%. The permanent magnet was shaped as a cylinder in which an uniform magnetic field is 1.4 T. The two beds of this rec…
Tissue engineering research has been on going for many years, people are making all the effort to explore the cell functions in cellular level and even in molecular level. Making the cells functional in an in vitro environment is a preliminary goal for the implantation and repair of complicated tissues/organs. Fabrica…
β‐spodumene glass–ceramics with a whisker‐like microstructure were prepared from the following materials (in wt%): 64.5 SiO 2 , 18.0 Al 2 O 3 , 4.2 Li 2 O, 4 ZrO 2 , and 8 MgF 2 . Scanning electron microscope (SEM) analysis showed that phase separation in the base glass leads to the formation of a primary crystal phas…
A three‐dimensional, object‐defined Monte Carlo simulation is applied to alumina‐silicon carbide whisker ceramic matrix composites. The simulation takes whisker orientation and size distributions into account simultaneously, and calculates a connectivity factor that relates whisker conductivity to macroscopic conducti…
Catalytic activity of Au-Pt, Au-Pd, and Pt-Pd dendrimer nanocomposites for reduction of p-nitrophenol was investigated in water. The bimetallic dendrimer nanocomposites were prepared by simultaneous reduction with sodium borohydride in the presence of poly(amidoamine) (PAMAM) dendrimers with amine and carboxyl termina…