Materials Literature
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The magnetic ordering of the anomalous antiferromagnet CeSb, which has a NaCl crystal structure, was determined in zero applied magnetic field by means of neutron diffraction investigations of single crystals and powder. Below the Neel temperature T N of (16.1+or-0.1)K, there exist six partially disordered magnetic ph…
Abstract The maximum of the d.c. conductivity of single crystals of the title compound ((TTT) 2 ‐I 3 ), grown by cosublimation, is shown to be at about 35K. The ratio of the b ‐axis (needle axis) conductivity at the temperature of its maximum (T m ≅ 35 K) and its value at T = 300 K (normalized conductivity σ (T m )/σ…
The deformation model considering a close interrelation and role of different processes has been proposed from systematic study of the superplastic flow in magnesium alloy. It is assumed that the superplastic flow of the alloy is caused by the cooperative operation of grain-boundary sliding (GBS) and some grain deform…
The important problem of disposal of nuclear waste in space is addressed. A prior study proposed carrying only actinide wastes to space, but the present study assumes that all actinides and all fission products are to be carried to space. It is shown that nuclear waste in the calcine (oxide) form can be packaged in a…
Investigation are made of kinetic characteristics of 〈111〉 tilt boundaries in aluminium bicrystals. Mobility of single boundaries driven by a constant driving force and Zn diffusion along these boundaries are studied. A comparative analysis is given of mobilities, diffusion coefficients, and activation barriers for th…
Transient photoconductivity has been used to measure the electron drift mobility in the ${c}^{\ensuremath{'}}$ direction of single-crystal naphtalene from 54 to 324 K. Below 100 K the mobility rises exponentially with decreasing temperature, an effect which we attribute to the onset of band-type motion limited by opti…
Using a self-consistent pseudopotential approach, band structures and charge densities have been calculated for trigonal Se and Te at hydrostatic pressures just below the transition to the metallic phase. The results are compared to zero pressure calculations and experimental data. Very good agreement between experime…
The Kirkwood theory of solutions of spherical ions is applied to aqueous solutions of macroions plus counter ions and to macroions in strong salt solutions. It is shown that the theory exhibits a mean field phase transition which is interpreted as a transition to the crystalline phase. The theory provides a qualitativ…
The specific heat Cpx has been measured for the binary system triethylamine–water as a function of temperature near the critical solution temperature at the critical concentration. Simple power law fits of the data resulted in rather large values (around 0.25) for the critical exponent α. For a fixed value of α equal…
The diffusion of $^{95}\mathrm{Nb}$ in niobium has been measured between 1353 and 2693 K. The data showed nonlinear Arrhenius behavior and fit the expression $D=[8\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}3}\mathrm{exp}(\ensuremath{-}3.62 \mathrm{eV}/\mathrm{kT})+3.7\mathrm{exp}(\ensuremath{-}4.54 \mathrm{…
In an array of one-dimensional conductors, fluctuations in the phase of the charge-density wave lead to changes in the electron density which are coupled by long-range Coulomb interactions. The Coulomb effect has a profound influence on the dynamics of the charge-density wave as observed by inelastic-neutron scatterin…
The electronic properties of the regular graphite lattice are investigated within self-consistent LCAO (linear combination of atomic orbitals) scheme based as a modified extended-H\"uckel approximation. The band structure and interband transition energies agree favorably with previous first-principles calculations. Go…
Estimates show that both the on-site and the near-neighbor electrostatic interactions in tetracyanoquinodimethane chains may be much greater than the bandwidth. A method of determining the exact ground state when the interactions are dominant is described; the electrons are found to have a periodic arrangement which m…
We study the effect of impurities on the dynamics of charge-density waves. At low temperature it is a good approximation to restrict our attention to phase fluctuation only. The competition between the random impurity potential and the elastic energy for phase fluctuations leads us naturally to consider two limiting c…
A new atomic number correction is proposed for quantitative electron-probe microanalysis. Analytical expressions for the stopping power S and back-scatter R factors are derived which take into account atomic number of the target, incident electron energy and overvoltage; the latter expression is established using Mont…
Abstract Mg-Al alloys decompose on ageing via a cellular reaction that produces large cells ( ca. 5-50 μm in diameter) consisting of alternating fine lamellae of Mg-Al solid solution and Mg17 Al12 intermetallic compound. This paper reports direct, high resolution microanalysis of individual points in cells formed by a…
An electron beam passing through a deflecting field is, in general, subject to aberrations such as distortion, astigmatism and coma in accordance with the deflecting angle. Accordingly, aberration defects of deflected beam are most serious limiting factor in performance of high resolution scanning electron microscopes…
日本短角種では,寒冷な山岳地帯において生産,育成された肥育素牛は,温暖な平地に移動して肥育することにより,寒冷な平地における肥育の場合に比べて肥育効率が脂肪交雑の増大という質的な面で向上することを既に報告した1).本調査では,寒冷地において実用化されている保温および換気に留意された無窓牛舎内における肥育効率について明らかにするために,日本短角種および黒毛和種を対象として,それらの血清中のグルコース,中性脂肪,遊離脂酸,燐脂質,総コレステロールなどの濃度を測定し,その結果を前記の調査成績と比較し,脂質代謝の面から検討した.日本短角種において,無窓牛舎内に肥育されている群は,寒冷平地肥育の群とは著しくその成績を異にし,温暖な平地に移動…
It has been shown by several investigations1,2 that AgNa(NO2)2, is a ferroelectric crystal which undergoes a phase transition of the first order, close to a second order one, at about 38°C. The transition may be assumed to be of the order-disorder type with the NO-2-groups forming the permanent electrical dipoles. The…
Measurements of thermal expansion, Young’s modulus, magnetic susceptibility and electrical resistivity at −150∼500°C, and hardness and density at room temperature have been made for annealed Mn–Pt alloys. It has been found that Mn-10.05∼40.21% Pt alloys cooled slowly after heating at 1100°C for 4 h have distinct anoma…