Magnon Specific Heat of Single Crystal Borocarbides RNi2B2C (R=Tm, Er, Ho, Dy, Tb, Gd)
Zero-field specific heat of the single crystals RNi2B2C (R= Er, Ho, Dy, Tb, Gd) was measured within the temperature range 0.1 K
Materials Literature
文献浏览
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。
Random-Site Cation Ordering and Dielectric Properties of PbMg1/3Nb2/3o3-PbSc1/2Nb1/2o3
(1-x)PbMg1/3Nb2/3O3-(x)PbSc1/2Nb1/2O3 (PMN-PSN) solid solution crystals have been grown by the flux method in the whole concentration range. X-ray supercell reflections due to B-cation ordering were observed for as-grown crystals from the 0.1 < x < 0.65 compositional range. Though the ordered domains are rather large…
Structural Tunability of the Plasmon Resonances in Metallic Nanoshells
Using the time-dependent LDA method, we investigate the tunability of the optical polarizability of small metallic nanoshells. We show that the energies of the two dipolar plasmon resonances vary with the ratio of shell thickness to particle radius in a manner similar to what has been predicted using classical Mie sca…
Luminescent Polymer Containing the Eu(III) Complex Having Fast Radiation Rate and High Emission Quantum Efficiency
Radiation rates and emission quantum yields of Eu(III) were modified using asymmetric deuterated Eu(III) complexes doped in poly(methyl methacrylate) (PMMA) deuterated tris-(hexafluoroacetylacetonato)europium(III) with phospine oxide in order to produce lowthreshold levels for laser transmission and amplifier emission…
The first-order Raman spectra of OsO2
The first-order Raman spectra of the transition metal dioxide OsO 2 with tetragonal rutile structure have been measured at room temperature. A linearly polarized argon laser light source and completely oriented single-crystal samples have made possible unambiguous determination of the four allowed Raman-active phonon…
Rapid endothelialization of PhotoFix natural biomaterial vascular grafts
To date, no off-the-shelf graft has performed better than the autologous vessel in applications requiring small-bore (< 6-mm diameter) vascular grafts. Much research has been devoted to seeding endothelial cells on synthetic grafts to improve their long-term clinical performance. One key challenge is the ability to re…
Syntheses, crystal structures, ferroelectrics and magnetic properties of [R-BzPy]2[Cu(mnt)2] complexes ([R-BzPy]+ = 1-(4′-R-benzyl)pyridinium, R = NO2 or Br; mnt2– = maleonitriledithiolate)
The structures of two ion-pair complexes, which consist of 1-(4′-R-benzyl)pyridinium (R = NO2 (1), Br (2)) and bis(maleonitriledithiolato)cuprate(II), have been determined by X-ray single crystal analyses, and the results show the stacking patterns in 1 and 2 are different from each other although the difference betwe…
Study of the low-frequency Raman scattering in NaNbO3crystal
The Raman scattering spectrum of the sodium niobate crystal, in both P and R phases, has been investigated from room temperature up to 440 ° C. The dependence of the low-frequency (LF) spectrum clearly reveals, for the first time, over a wide temperature range, the presence of a strong quasi-elastic scattering below a…
Thermodynamic analysis of temperature-graded ferroelectrics
A Landau–Ginzburg thermodynamic model is constructed and used to develop a methodology for analyzing temperature-graded ferroelectrics. Spatial nonuniformities in temperature are shown to give rise to nonuniformities in polarization with corresponding spatial variations. The magnitude and the sign of the polarization…
Mixed alkali effect in borate glasses - electron paramagnetic resonance and optical absorption studies in Cu2 dopedxNa2O– (30 x)K2O– 70B2O3glasses
The mixed alkali borate glasses $xNa_2O-(30 - x)K_2O-70B_2O_3$ (5 \\leq x \\leq 25, doped with 0.5 mol% of CuO, have been investigated, using electron paramagnetic resonance (EPR) and optical absorption techniques, as a function of mixed alkali content, to look for the 'mixed alkali effect' (MAE) on the spectral prope…
Cell attachment and growth on films prepared from poly(depsipeptide‐co‐lactide) having various functional groups
In tissue engineering related to the regeneration of damaged or lost tissue, excellent biodegradable materials are desired as temporary scaffolds to support cell growth and then disappear with the progress of tissue regeneration. We previously synthesized biodegradable poly(depsipeptide-co-lactide), poly[(Glc-Asp)-co-…
Direct measurements of grain boundary sliding in yttrium-doped alumina bicrystals
The behavior of grain boundary sliding in pure and yttrium-doped Al2O3 was directly measured at a high temperature, using bicrystal experiments. For this purpose, we fabricated Al2O3 bicrystals containing a random grain boundary with or without yttrium ions. High-resolution transmission electron microscopy observation…
Effect of additional nonmagnetic acceptor doping on the resistivity peak and the Curie temperature of Ga1−xMnxAs epitaxial layers
We have investigated the effect of additional doping by Be on the properties of Ga1−xMnxAs (x=0.03). For this relatively low value of x, the Curie temperature is observed to increase with increasing Be concentration. We show that the temperature dependence of the resistivity at zero magnetic field, including the resis…
Fine mist versus large droplets in phase separated manganites
The properties of phase-separated systems, e.g., manganites close to a first-order phase transition between charge-ordered insulator and ferromagnetic metal, are usually described by percolation picture. We argue that the correlated occupation of metallic sites leads to the preferential formation of larger metallic cl…
Ferromagnetic Ga1−xMnxAs produced by ion implantation and pulsed-laser melting
We demonstrate the formation of ferromagnetic Ga1−xMnxAs films by Mn ion implantation into GaAs followed by pulsed-laser melting. Irradiation with a single excimer laser pulse results in the epitaxial regrowth of the implanted layer with Mn substitutional fraction up to 80% and effective Curie temperature up to 29 K f…
Implantation site of rare earths in single-crystalline ZnO
The lattice location of rare-earth Er167m in single-crystalline hexagonal ZnO was studied by means of the emission channeling technique. Following 60-keV, room-temperature implantation of the precursor isotope Tm167 at doses of 1.3–2.8×1013 cm−2 and annealing up to 900 °C, the angular distribution of conversion electr…
Dynamics of yielding observed in a three-dimensional aqueous dry foam
We study the onset of yielding in stable three-dimensional dry foams following the start up of steady shear flow. By means of a charge-coupled device camera equipped with a small depth-of-field objective, we visualize the Plateau border network in the bulk of the foam. The onset of yielding is identified with the defo…
A multiscale analysis of fixed-end simple shear using molecular dynamics, crystal plasticity, and a macroscopic internal state variable theory
A multiscale analysis of fixed-end simple shear using molecular dynamics, crystal plasticity, and a macroscopic internal state variable theory, M F Horstemeyer, M I Baskes, V C Prantil, J Philliber, S Vonderheide
High-speed focused-ion-beam patterning for guiding the growth of anodic alumina nanochannel arrays
Long-range ordered arrays of anodic alumina nanochannels are grown by anodizing an aluminum covered with a patterned layer of polymethylmethacrylate (PMMA) resist. The two-dimensional hexagonal-closed-packed pattern is created by focused ion beam (FIB) exposure of the PMMA and transferred onto the aluminum surface by…
One-shot-laser-pulse-induced demagnetization in rubidium manganese hexacyanoferrate
We report on the photomagnetic effect in Rb0.91Mn1.05[Fe(CN)6]⋅0.6H2O ferromagnet. Magnetization of this system was reduced by irradiation with only one-shot of laser pulse (532 nm) at 3 K. This photodemagnetization was observed only when the laser power density (P) was above 9.3 mJ cm−2 pulse−1. The quantum yield was…