Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The magnetization and magnetostriction of a variety of 3/16-in.-diam Laves phase rods of TbxDyyHo1−x−yFe1.95 grown in the form of [112] oriented dendritic compounds were measured as a function of applied magnetic field −3000<H<3000 Oe and compressive stresses of 22 and 47 MPa at room temperature. Compare…
High-precision thermal conductivity measurements have been performed on a single crystal of ${\mathrm{La}}_{1.67}{\mathrm{Sr}}_{0.33}{\mathrm{NiO}}_{4}$ as well as on polycrystalline samples of ${\mathrm{La}}_{2\ensuremath{-}x}{\mathrm{Sr}}_{x}{\mathrm{NiO}}_{4}(x=0.33,1)$ and ${\mathrm{Sr}}_{1.5}{\mathrm{La}}_{0.5}{\…
The properties of thin films of BaScxFe12−xO19 (x=0.4) were determined by structural and magnetic measurements. Films were deposited by pulsed laser ablation deposition onto c-plane sapphire at oxygen pressures between 10 and 100 mTorr. X-ray diffraction measurements showed all films to be single-phase c-axis oriented…
We consider the energy losses undergone by an electron reflected inside the extended electron-density distribution at the surface of a metal. The random-phase approximation calculation of the dynamical response with a local-density approximation ground state reveals the dramatic enhancement of the multipole-plasmon in…
The initial results of a systematic study of the effects of Nd:Pr ratio and Fe:didymium (where didymium is a mixture of Nd and Pr) ratio on the magnetic properties of nanocrystalline melt spun didymium–Fe–B alloys are presented and discussed. The stoichiometric composition, corresponding to didymium2Fe14B, with Nd:Pr…
After photolytic induction (411 nm) of the reaction between chromyl chloride and olefins in low-temperature matrixes, for the first time primary products of this system have been isolated and identified: the reaction of propylene yields O=CrCl(2).O=CHCH(2)CH(3) and while in the case of trans- and cis-2-butylene, OCrCl…
Soft magnetic composite materials produced by powder metallurgy techniques can be very useful for construction of low cost small motors. However, the rotational core losses and the corresponding B–H relationships of soft magnetic composite materials with two-dimensional rotating fluxes have neither been supplied by th…
Magnetization reversal modes and coercivities were calculated for a magnetic particle with thickness : width : length aspect ratios 0.1 : 1 : 5 as a function of the reduced particle width d/lex, where d is the particle width and lex is the intrinsic magnetostatic exchange length. With only exchange energy and magnetos…
In this Letter, a model of a Cd 1 - y Mn y S nanocrystal is proposed to explain the appearance of manganese ions isolated in the tetrahedral site, at relatively high composition, whereas magnetic interactions markedly increase in the nanosized range compared to the bulk phase.
A method is described for the liquid chromatography/tandem mass spectrometry analysis of free base porphyrins, which allows the routine and rapid recognition of alkyl substituents in the components of complex natural mixtures. The method overcomes difficulties associated with probe tandem mass spectrometry or liquid c…
Post-transit photocurrent analysis, based on the time-of-flight transient photoconductivity technique, was successfully carried out for a series of amorphous selenium $(a\ensuremath{-}\mathrm{Se})$ thin films. The method allows a determination of the density of gap states beyond the shallow tail states from the emissi…
Coprecipitation and microemulsion were used to prepare nanosized magnetite. The average particle sizes of samples A and B were calculated by Brunauer–Emmett–Teller analysis and are 8.16 and 2.24 nm, respectively. The saturation magnetization of sample A at 300 K was 57.2 emu/g, but sample B was not saturated even 7.0…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSynthesis of a Novel Oligo(p-phenylene) Ladder by Sulfide and Sulfonio GroupsAgus Haryono, Kenji Miyatake, Junichiro Natori, and Eishun TsuchidaView Author Information Department of Polymer Chemistry, Advanced Research Institute for Science and Engineering, Waseda University, T…
SmCo x – Co (x=3.5, 4, and 5) nanostructured multilayers have been prepared by dc and rf sputtering. Magnetic hardening has been found in the as-deposited thin films. The effects of the Co and hard-phase layer thicknesses and the effect of the Cr underlayer have been studied. Further magnetic hardening has been achiev…
An experimental and theoretical study is presented of the normal magnetic modes in spiral ferromagnetic structures. The bilayer system studied consists of Fe layers (25, 50, 100, and 200 Å thick) that are exchange coupled to 200 Å thick SmCo films that have ≈200 kOe anisotropies. The Fe spiral—induced by an external m…
A novel magnetic organogel that can be considered a precursor example of a magnetoresponsive gel is reported. The gel is formed by the bridging of ferrite containing anionic bis(2-ethlhexyl) sodium sulfosuccinate reverse micelles with 2,6-dihydroxynaphthalene (2,6-DHN). The addition of 2,6-DHN leads to a room temperat…
Fe 100−x Pt x alloy thin films with x=25–67 at. % were prepared by dc magnetron sputtering on naturally oxidized Si substrates. Effects of film composition, annealing temperature (300–650 °C), annealing time (5–120 min), and cooling rate (furnace cooling or ice water quench cooling) on the magnetic properties were inv…
The visible luminescence of ${\mathrm{Pr}}^{3+}$-doped fluoride ${\mathrm{LiKY}}_{1\ensuremath{-}x}{\mathrm{Pr}}_{x}{\mathrm{F}}_{5}$ crystals $(x=0.001,$ 0.01, 0.02, 0.03, 0.05, and 0.1) has been investigated as a function of concentration and temperature by using time-resolved laser spectroscopy. The temperature-dep…
A two-dimensional, dynamic, micromagnetic model of a thin strip of permalloy is described and used to model the magnetization dynamics of the strip as it is subjected to a transverse step field. The numerical results are compared to experimental data. The experimental precession frequency is matched by varying Hk, the…
We have grown ${\mathrm{Bi}}_{1\ensuremath{-}x}{\mathrm{Sb}}_{x}$ alloy thin films on $\mathrm{CdTe}(111)B$ over a wide range of Sb concentrations $(0<~x<~0.183)$ using molecular-beam epitaxy. Temperature-dependent electrical resistivity (\ensuremath{\rho}) and thermoelectric power (S) were studied. We have obse…