Materials Literature
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Hiperco® 50 alloy heat treated between 450 and 650 °C exhibits superior mechanical properties. We report the measurements of the ac core loss at various frequencies up to 4500 Hz of the Hiperco® 50 alloy samples annealed at 450 and 650 °C. The 650 °C annealed specimens have lower ac core loss than that of the 450 °C a…
Sm–Co/Co and Sm–Co/Fe–Co nanocomposites have been fabricated by electroless plating of Sm–Co powders with Co and Co–Fe, respectively. The influence of electroless plating conditions on the magnetic properties and structure of the coatings were studied. The saturation magnetization (Ms) and morphology of the deposited…
We have studied the magnetization reversal of two-dimensional (2D) arrays of parallel ferromagnetic Fe nanowires in nanoporous alumina templates. Combining bulk magnetization measurements using a superconducting quantum interference device with field-dependent magnetic force microscopy (MFM), we decomposed the macrosc…
Crystal structure of H 3 NCH 2 COOH·H 2 PO 3 was studied in the paraelectric phase (P phase) at 298 K and in the ferroelectric phase (F phase) at 170 K by means of the single crystal neutron diffraction. Two independent protons in the hydrogen bonds forming the H(HPO 3 ) - chains are disordered over two sites with the…
The magnetic, transport, and magneto-optical properties of Ni2MnGa alloy in the martensitic and austenitic states were investigated. The temperature dependence of resistivity shows kinks at the structural and ferroparamagnetic transitions. The temperature dependence of magnetization was also investigated for both the…
We report on the crystal structure of epitaxial (Ga,Mn)N films with Mn=0.2% grown by plasma-enhanced molecular beam epitaxy, exhibiting n-type conductivity and room temperature ferromagnetism (Ms=0.76 emu/cm3, Hc=90 Oe). The additional diffraction spots are found in the zone axis of B=[11̄00] for the (Ga,Mn)N epilayer…
The hysteresis properties of epitaxial SmCo/Co and SmCo/Fe bilayers are calculated by the solution of the Landau–Lifshitz Gilbert equation. The thin film grain structure is taken into account using appropriate finite element techniques. The J(H) curve shows the typical exchange spring behavior for the bilayer if the s…
Abstract New super‐tough poly(butylene terephthalate) (PBT)/poly(ethylene‐octene) copolymer (PEO) blends containing 2 wt% poly(ethylene‐co‐glycidyl methacrylate) (EGMA) as a compatibilizer were obtained by extrusion and injection molding. The blends comprised of an amorphous PBT‐rich phase with some miscibilized EGMA,…
SmCo 5(1−x) Fe x (x=0.2, 0.4, 0.6, and 0.7) nanocomposites were synthesized by ball milling a mixture of SmCo5 and nanosize iron powders. Composites were made using different kinds of soft ferromagnetic phase nanoparticles, either α-Fe crystallized from amorphous iron generated by sonochemical decomposition of Fe(CO)5…
A voltage-dependent transmittance curve of the fringe-field switching (FFS) mode was studied with varying dielectric anisotropy of a liquid crystal (LC). The results show that for the LC with positive dielectric anisotropy the disclination lines existing between domains extend into the active region with increasing vo…
The preparation of complexes trans-[Ni(-SeC(6)H(4)-o-NH-)(2)](-) (1), cis-[Ni(-TeC(6)H(4)-o-NH-)(2)](-) (2), trans-[Ni(-SC(6)H(4)-o-NH-)(2)](-) (3), and [Ni(-SC(6)H(4)-o-S-)(2)](-) (4) by oxidative addition of 2-aminophenyl dichalcogenides to anionic [Ni(CO)(SePh)(3)](-) proves to be a successful approach in this dire…
Magnetic studies of dimeric copper complexes reveal interesting and predictable cooperative responses governed by the underlying topological lattice configurations. Temperature dependent susceptibility in several compounds measured with a physical property measurement system indicates predominantly antiferromagnetic e…
Three kinds of TiO 2 layers were formed on SiO 2 /Si substrates: (200)-oriented TiO 2 with rutile structure, (103)-oriented TiO 2 with anatase structure and randomly oriented TiO 2 . All the Pt films deposited on the TiO 2 layers had (111) orientation. Pt films deposited on the rutile TiO 2 had a columnar structure an…
We have investigated the effectiveness of Al, Au, Cu, Ni, Fe, and Ta films with thicknesses up to 4 nm for protecting a Co surface from oxidation in air at room temperature. The distinct change in the Co 2p3/2 core-level line shape observed by x-ray photoelectron spectroscopy upon the oxidation of Co makes it a simple…
Abstract In this article we determine the miscibility of azobenzene derivative (poly(4‐(N‐(2‐methacryloyloxyethyl)‐N‐ethylamino)‐4′‐nitroazobenzene) 90 ‐co‐(methyl methacrylate) 10 )/poly(vinyl acetate) (PVAc) and azobenzene derivative/poly(vinyl chloride) (PVC) blends using Fourier Transform infrared (FT‐IR) spectros…
We have studied the field dependence of the magnetization in epilayers of the diluted magnetic semiconductor Ga1−xMnxAs for 0.0135<x<0.083. Measurements of the low temperature magnetization in fields up to 3 T show a significant deficit in the total moment below expected for full saturation of all the Mn…
The effects of grain/particle size and morphology on the coercivity of Sm2(Co1−xFex)17 based powders and spin cast ribbons are investigated in an attempt to make pure Sm–Co 2:17 magnets with a higher energy product than that currently available. It is observed that the coercive force is not only affected by the compos…
Magnetization measurements using a Gd5(Si1.95Ge2.05) single crystal with the magnetic field applied along three crystallographic directions, [001], [010] and [100], were carried out as a function of the applied field (0–56 kOe) at various temperatures (∼5–320 K). The magnetic field (H)–temperature (T) phase diagrams w…
A new anharmonic factor and the extended X-ray absorption fine structure (EXAFS) including anharmonic contributions have been developed based on the cumulant expansion and the single-shell model. Analytical expressions for the anharmonic contributions to the amplitude and to the phase of the EXAFS have been derived. T…
The analysis of polarization diagrams for specular and scattered second harmonic generation (SHG) was used for the structural characterization of submicron domain structures of thin (Ba,Sr)TiO3 (BST) films. It is shown that the lack of separation of these two contributions may lead to completely wrong conclusions abou…