Materials Literature
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La–Zn substituted Sr-ferrite thin films were prepared by rf diode sputtering. The magnetic and crystallographic properties of the films were investigated by vibrating sample magnetometry and x-ray diffractometry. It is found that the texture of the films sensitively depends on the amount of substitution. Both the satu…
A study of the effects of microstructural changes on domain structure and magnetic properties as a result of fatigue has been made on Fe–C alloys subjected to either cold work, stress-relief annealing, or heat treatment that produced a ferritic/pearlitic structure. The magnetic properties varied with stress cycling de…
5,12-Dioxocyclams and bis-dioxocyclams were capped across the 1,8-secondary amino groups with 2,6-bis(bromomethyl)pyridine to give pyridine-capped mono- and bis-dioxocyclams. The copper(II) complex of capped monocyclam 5b was prepared and characterized by X-ray crystallography. Treatment of dioxocyclams with 2,3,5,6-t…
Abstract Porphyrin‐porphyrin and porphyrin‐chlorin dimers have been synthesized and evaluated for their photo‐physical and in vivo photodynamic therapy properties. Two of them can become potential new photosensitizers. Study of the reactivity of meso ‐tetraaryl porphyrins, as dienophiles, in Diels‐Alder transformation…
SmCo films with a Cr underlayer have been investigated as potentially attractive candidates for high density recording media. Magnetron sputtering was used here to produce Cr/SmCox/Cr films on Si (100) substrates. The magnetic films were deposited at a substrate temperature of 350 °C and an Ar pressure of 5 mTorr. Cr…
Novel long-chain acrylate based copolymers containing triphenylene groups have been synthesized which will open up new opportunities to synthesize discotic networks with columnar structure. This structure exists in the copolymer even when a non-discotic comonomer is introduced up to 75 mol-%. The cross-linking of the…
Very often outerwear apparel is made of water resistant yet breathable fabrics, and normally these fabrics have multilayer structures of various polymeric materials. The working mechanisms of water vapor transmission through these fabrics are not well understood. The rate at which these breathable fabrics are able to…
The kinetics of enthalpy relaxation (recovery) at the glass transition in x K 2 O·(20− x )MgO·80TeO 2 glasses has been examined from heat capacity measurements using differential scanning calorimetry to clarify the features of the structural relaxation in ternary TeO 2 ‐based glasses. Ternary glasses such as 10K 2 O·1…
Nanoemulsion polytetrafluoroethylene (nano-PTFE) is a promising low-dielectric-constant polymer, which can be prepared in thin-film form by spin-on techniques. Similarities and differences of the nano-PTFE material to the well-known class of PTFE polymers with respect to morphology and dielectric and electret characte…
A new, more accurate formula describing double and multiple-shell axial magnetic shielding is obtained as a result of numerical verification of existing estimations. A standard ANSYS® software package was used. Parameters of the numerical model are as follows. Two concentric, closed cylinders of equal thickness and co…
Metal–ceramic composite pipes were prepared through simultaneous extrusion of different pastes by a multi‐billet extrusion method. ZrO 2 and stainless steel powders were chosen, and an aqueous solution of water‐soluble polymer, hydroxypropyl methylcellulose (HPMC), was used as binder. The maximum extrusion pressure an…
In the present work the results of a study concerning the surface properties of coating materials obtained from fluorinated latices are reported. Better understanding is required regarding the influence of polymer structure, latex composition, and morphology on the surface properties of the resulting films. For this p…
The letter describes an approach to a representation of transient behavior due to switching off complex nonlinear circuits. For this purpose the widely known Jiles model (JM) was implemented into the Alternative-Transient-Program (ATP). Calculations have been made on simplified transformer single-phase and three-phase…
The tricatenar, hydrogen-bonded complexes formed between alkoxystilbazoles and an imine were found to be mesomorphic. Subsequently, related tetracatenar complexes were also investigated and found to be non-mesomorphic. We report the transition temperatures of these complexes and discuss structural modifications.
MnBi crystallizes in a NiAs-type hexagonal crystal structure, exhibits a high uniaxial anisotropy, and is potentially useful as a permanent magnet material. We have examined the effect of partial substitution of Bi with rare earth elements on the magnetic properties of MnBi. MnBi1−xRx (R=Nd, Dy) were prepared by mecha…
We present the results of a Molecular Dynamics computer simulation of a binary Lennard-Jones liquid confined in a narrow pore. The surface of the pore has an amorphous structure similar to that of the confined liquid. We find that the static properties of the liquid are not affected by the confinement, while the dynam…
A finite element method was used to simulate domain wall pinning in SmCo5/Sm2Co17 based permanent magnets. The finite element model was built according to the cellular microstructure obtained from transmission electron microscopy investigations. The numerical results show a strong influence of the dimension of the cel…
We report the synthesis, X-ray diffraction results and electro-optical switching measurements for a bent-shaped mesogen having two non-mesogenic units linked by an alkylene spacer. The novelty of the molecular structure lies in the carbonyl group of the ester linkage being directly attached to the spacer unit, unlike…
The corrosion of steels and of nickel-based alloys was studied in exposure experiments at 600 °C beneath a molten CaSO4-K2SO4-Na2SO4-PbSO4-ZnSO4 sulphate mixture in N2-5 vol.% O2 with and without additions of 1000 vppm HCl, 1000 vppm SO2 and 1000 vppm HCl in combination with 250 vppm SO2. In the N2-5 vol.% O2 atmosphe…
Epitaxial thin films of La0.62±0.05Ca0.33±0.02MnO3−δ were grown by laser ablation on SrTiO3. On (100) substrates the films grow with the larger c axis perpendicular to the plane. The films deposited on (110) SrTiO3 grow with both the c (long) axis and a (or b, short) axis in the plane of the film. The electrical resis…