Materials Literature
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Bulk anisotropic composite Nd14Fe79.5Ga0.5B6/alpha-Fe magnets with (BH)max=45-55 MGOe were synthesized by compacting Nd-Fe-Ga-B powders coated with thin alpha-Fe layers followed by hot compaction at 600degC to 700degC and hot deformation (die upsetting) at 850degC to 950degC with a height reduction of 71%. The coating…
We present molecular dynamics (MD) studies of the liquid structure, thermodynamics, and dynamics in a one-component system described by the Ercolessi-Adams embedded atom method potential for Al. We find two distinct noncrystalline phases in this system. One of them is a liquid phase and the second phase has similar st…
The corrosion behavior of as-cast AZ91D magnesium alloy in 0.1M sodium sulfate solution at the corrosion potential (Ecorr) was investigated by using electrochemical impedance spectroscopy (EIS), environmental scanning electron microscopy (ESEM), energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). T…
We present an investigation of the effects of the variations in the metal-to-glass ratio of Co-rich microwires, on the low field microwave absorption (LFA) at 9.4 GHz. LFA as a function of the DC applied field exhibited a double peak; its separation increased as the metal-to-total diameter ratio, p, decreased (p= meta…
Nb2AsC showed superior mechanical properties to those of other layered ternary carbides (Kumar et al 2005 Appl. Phys. Lett. 86 111904). In the present density functional calculation, the underlying mechanism is interpreted by astonishing bonding features of Nb2AsC. The Nb d–As (px + py) and Nb d–As pz bonding states l…
A series of amphiphilic lipopeptides, ALPs, consisting of an alternating hydrophilic and hydrophobic amino acid residue sequence coupled to a phospholipid tail, was designed to form supramolecular assemblies composed of beta-sheet monolayers decorated by lipid tails at the air-water interface. A straightforward synthe…
Metamaterial composites consisting of copper wires and yttrium iron garnet (YIG) slabs have been theoretically studied using the transfer function matrix technique and predictions of electromagnetic scatterings have been compared well with experiments. An array of copper wires (without ferrite) showed plasma-like beha…
Two time-stepping methods based on the concept of magnetic viscosity have been compared from the viewpoint of their ability to reproduce the dynamic B-H loops and losses in nonoriented electrical steels with high silicon content studied experimentally. The methods are suitable for describing arbitrary magnetization re…
Thin end of the wedge: A block molecule, which consists of a rigid wedge-shaped aromatic segment linked at its apex to a flexible poly(ethylene oxide) chain, self-assembles into cylindrical nanofibers in both polar and nonpolar solvents. The structure of the nanofibers changes reversibly in response to solvent polarit…
Two mixed ferrite systems, namely Ni0.65Zn0.35Fe2O4(Ni-Zn) and Mn0.75Zn0.18Fe2.07O4(Mn-Zn) have been prepared by coprecipitation method, and then the resulting ultrafine powders were heat treated at different temperatures from 200 to 800degC for improved crystallinity and magnetic properties. The samples were characte…
First-order reversal curves (FORC) diagrams map the statistical distributions of magnetic hysterons, based on their critical fields (Hc) and local interaction fields (Hu), throughout the magnetization reversal. This technique has been adapted to soft nanowire arrays deposited into alumina templates, with axes perpendi…
A series of six new ligands (L(1)-L(6)) suitable for the formation of luminescent lanthanide complexes in water is described. Ligands L(1)-L(4) are constructed from two 6'-carboxy-6-methylene-2,2'-bipyridine chromophoric arms bonded to the amino function of a 2-aminomethylene-6-carboxy-pyridine (L(1)), an N,N-diacetat…
The effect of phonon scattering on the intrinsic delay and cutoff frequency of Schottky-barrier carbon nanotube (CNT) FETs (CNTFETs) is examined. Carriers are mostly scattered by optical and zone-boundary phonons beyond the beginning of the channel. It is shown that the scattering has a small direct effect on the dc o…
Tissue engineering aiming to repair or regenerate damaged tissues necessitates fabricating three-dimensional biomaterial scaffolds with controlled porosity for delivering cells. To facilitate cell distribution, a strategy using stem cell-based fabrication of biomaterials was tested in type II collagen fibers. Human me…
The effect of grain size on iron losses were compared for two electrical steels with 0.5 and 1.5 wt% Si. The results confirm that the optimum grain size for minimizing the energy losses decreases when the electrical resistivity decreases or when the frequency increases. Experimental results are compared to a model whi…
We have realized high-efficiency excitonic emission with deep-UV light at room temperature for a (001)-oriented diamond light-emitting diode with an intrinsic diamond layer as an active region. The boron-doped p -type, non-doped intrinsic, and phosphorus-doped n -type ( p – i – n ) junction diode structure was formed…
Abstract The study was conducted to investigate the relationship between some standard measures of soil reserve potassium (K) and soil mineralogy. Eight different agricultural soils from the N temperate and S boreal regions were studied and analyzed both by standard methods (exchangeable K, 2 M HCl‐ and aqua regia –ex…
Values of the uniaxial anisotropy, cubic anisotropy, saturation magnetic induction, and saturation magnetostriction were obtained from measurements of the magnetization and magnetostriction of stress-annealed Galfenol (Fe100-xGax,x=12.5,18.4, and 22.0)and Fe81Al19as a function of compressive stressesi=-mu0MsHalphaz+Kc…
Domain observation has been done to investigate the effect of strain due to a punching process on the magnetization process of a nine-slot core for 12-pole small brushless dc motor by using the Kerr microscopy technique. Stripe domain structures oriented to a transverse direction are observed at the edge of a tooth of…
We explore a concept which promises a reversible change of the magnetic properties of transition metals as the function of an applied voltage, namely introducing space-charge regions at the surface of high surface area metals wetted by an electrolyte. In nanoporous Pd$_1 - x$Co$_x$alloys near their Curie temperature w…