Materials Literature
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An analytical study of magnetization dynamics in nanomagnets subjected to magnetic fields and spin-polarized electrical currents is discussed. It is shown how the presence of various dynamical regimes depends on magnetic properties of the investigated system, in particular, it is demonstrated that the magnetization re…
The remagnetization process of Fe-rich wires as dependent on the circular magnetic field induced by the AC current flowing through the wire is investigated experimentally. We present the dependence of the switching field on the amplitude and frequency of the circular magnetic field and its variance with the applied te…
Co/Fe multilayers were grown onto different substrates by means of a molecular beam epitaxy system equipped with e-guns. The microstructural and magnetic properties were studied as a function of both the growing temperature and the Fe-layer thickness. All the samples grown at room temperature show a magnetic behavior…
Abstract Methoxy‐capped poly(ethylene glycol) (PEG) was used to prepare ATRP initiator (PEGBr). PEGBr was copolymerised with t ‐butyl methacrylate (tBMA) by using atom transfer radical polymerization (ATRP) chemistry. tBMA residues were converted to methacrylic acid (MAA) by acidic hydrolysis under mild conditions to…
The possibility of the ferroelectric phase transition in SrTi 18 O 3 only by decreasing the frequency of zero-point vibration due to the substitution of 18 O for 16 O is investigated by the self-consistent phonon approximation (SCPA) of an anharmonic lattice vibration system. The SC equation for the soft-mode frequenc…
Abstract Influence of wurtzite–zinc‐blende energy on nucleation rate and growth kinetics is studied. The physical model of III‐V nanowires growth is proposed. We show that wurtzite–zinc‐blende interfacial energy caused formation of the zinc‐blende structure on the initial stage of nanowires growth. Role of the fluctua…
The Barkhausen noise was measured in nonoriented Fe–3%Si steel with different average grain sizes. Air gaps between the yoke and the measured objects were also varied during the measurements. The change of the grain size was achieved by different combinations of cold rolling and heat treatment processes. The rise of t…
In this paper, we report magnetostriction measurements and an investigation of structural properties on melt-spun ribbons of Fe$_{85.7}$Al$_{14.3}$, Fe$_{81.3}$Al$_{18.7}$, and Fe$_{77.7}$Al$_{22.3}$ribbons produced at different wheel speeds. The bcc-disordered A2 structure is obtained for 14.3 and 18.7 at %Al whereas…
SSZ-13 molecular sieve is prepared by the traditional hydrothermal method with silica sol, aluminium sulphate, sodiumhydroxide and deionized water as raw material, and N, N, N-trimethyl-l-adamant ammonium hydroxide as a template. Itis investigated in terms of the influencing factors and optimal reaction conditions, an…
Abstract Solution property of hydrogenated polystyrene‐b‐poly(ethylene/butylene)‐b‐polystyrene triblock copolymer (SEBS copolymer) was studied by using static light scattering and dynamic light scattering for cyclohexane and N‐methylpyrrolidone (NMP) solutions. From the values of dimensionless parameters ρ, defined as…
The present paper numerically investigates the micromagnetic behavior of permalloy nanostrips, starting from the space-time integration of the Landau-Lifshitz-Gilbert equation. The analysis is performed on objects with variable longitudinal size of the order of some hundreds of nanometers. The attention is focused on…
Abstract Zinc oxide (0001) bulk crystals were implanted by 100 keV H2+ ions with various fluences in the range of 5×1016 to 3×1017 cm–2. Surface layer exfoliation was observed in the case of samples that were implanted with fluence higher than 2.5×1017 cm–2, either in the as‐implanted state or after annealing at highe…
We achieve controllable noninterferometric rotation of a bored helical beam by introducing a phase shift exclusively to the annular helical region of the phase. We present a derivation based on the decomposition of the beams, which shows that a constant phase shift of DeltaPhi between the bore and the surrounding heli…
The analysis of the noise temporal correlation effects on spectral properties and relaxation phenomena in hysteretic systems driven by arbitrary colored noise processes is presented. The calculations are performed under the framework of Monte Carlo techniques for simulating the stochastic processes and Preisach formal…
Mesoscopic hysteresis models are based on a simplified description of the micromagnetic theory in order to simulate magnetization processes on the magnetic domain space scale. Hence, these models are situated between the micromagnetic and macroscopic models. In the presented mesoscopic description, the local magnetiza…
An in-plane vectorial analysis of the magnetization of thin magnetic films is presented. Longitudinal soft x-ray resonant magnetic reflectivity curves display characteristic nodes where the longitudinal scattering component is suppressed by x-ray interference. The transverse magnetic component can be effectively retri…
Abstract The deposition of Germanium (Ge) prior to the conversion of Si(100) into 3C‐SiC(100) results in changes of the structure and surface morphology of the formed silicon carbide layer. First of all it reduces the thickness of the 3C‐SiC layer grown during the conversion process and therefore the probability of vo…
The trichloroacetimidate method has been utilized for the glycosylation of porphyrins. The corresponding glycoconjugates were obtained rapidly, in high yields, and excellent purity. A three-step sequence using well-matched (Lewis) acids was found to be highly effective and reliable.
Fabricating superhydrophobic surfaces via self-assembly of organic conjugated small molecules is realized by spray-drying the thiophene derivates organic solutions. Formation of microsized pores and arrayed nanofibers or nanorods on the surfaces is responsible for the superhydrophobicity of the coatings. This techniqu…
Most studies on the effects of cold treatment on the wear of steels have been carried out on tool steels. Although carburised components are also routinely cold treated at –70oC to remove excessive retained austenite, there are few data on how this treatment affects lubricated wear. Nor are there many reports on the e…