The possibility of practical application of the results of investigations of air environmental pressure changes in the vicinity of a conductor in which electric current flows is shown. The one-to-one match of environmental pressure changes to alterations of electric current can be applied under transfer of a regulated movement to mobile parts of micro and nanodevices. In accordance with the trends in the development of fields science and industry that require precision accuracy, the modes of small controlled movements of working parts are of greatest interest. When the same current pulses are fed into electric circuit of the described device, the rapid alterations of the pressure are well repeated. The correspondence is observed in a wide range of electric current amplitude and pressure values. The observed peculiarities of the pressure change were used for a regulated shift of the miniaturized holder. In the experiments, when the current in the conductor was altered, the air pressure in the pipe changed resulting in the motion of membrane and the holder that was fixed on it. Small shifts were monitored in microscope. For a convenience to watch the movements of the holder, a glass plate with a defect was placed beneath the holder. Upon a start of a current pulse, the pressure in the working pipe volume increased and by the action onto the elastic membrane caused the movement of the holder fixed on the membrane. When the pulse started, the holder rapidly reached a maximal value of the shift. After reaching the maximal value of the shift, the position of the holder remained almost unchangeable. After turning off the current pulse the holder went back to its original position. The controlled motion of the holder shown in the paper is in the range from less than 2 up to 200 microns. At lower values of pulse current amplitudes, the movement of the holder is less. The consistency of the results was determined solely by the parameters of the electric current pulse. The movements less than 1 micron became possible by applying small values of the current amplitudes. The experiment was carried out in which a plastic cylinder with the inner diameter c.a. 8 mm was attached to the tap of the glass pipe. The teflon piston was installed inside the cylinder, with the ability of free movement inside this cylinder. When a series of current pulses were supplied to the electric circuit from a signals generator, the piston made fast reciprocating motions, which could be easily watched visually. The results of the performed investigations suggest the possibility of widespread use of the effect of the fast pressure change of air environment near the conductor upon current alteration for solving scientific and technical problems. It is possible to create new devices, among others for nanotechnologies, which have great advantages in comparison with existing ones. One can obviously predict application for the creation of micro- and nano-instruments what has a great importance up to date. The simplicity of making such instruments lets us consider that the effect of one-to-one match of the pressure change to the electric current alterations in the working camera is prospective.

A change of thermodynamic parameters of surrounding air is experimentally investigated in the vicinity of metal conductor in which electric current flows. Substantial variations of pressure that are comparable with large meteorological variations are experimentally observed upon flowing a direct current pulse with a small amplitude and alternating currents of an industrial frequency through the conductor. Such significant and fast variations of the pressure occur at the instant the current in the conductor changes. Even current pulses with a short duration influence the pressure distinctly. Jumps of the pressure are experimentally observed in an investigated volume upon both building up the current amplitude and switching off the current pulse. These jumps are not typical for a usual cooling or heating of air mixture. It is expected that an exact correspondence between current pulses and the pressure variations makes it possible to create new technical equipment. The possibility of applying experimentally obtained results in device physics and nanotechnology science is of special interest.

Magnetic ordering in a mixed domain structure composed of a stripe domain and asymmetrically localized magnetic impurity inside the stripe domain was investigated. The analytical expression for domain walls deformation mediated by the influence of the magnetostatic stray field of the asymmetrically localized magnetic impurity was obtained. The calculations were done for the magnetic film with parameters which are typical for films used in magnetic memory. Experimental implementation of the mixed domain structure composed of the stripe domain and asymmetrically localized magnetic impurity inside the stripe domain was done in (BiLu) 3 (FeGa) 5 O 12 film. Obtained analytical solution for the shape of stripe domain walls distortion is in excellent agreement with the experimental results.

The phenomenon of domain magnetic shielding by the magnetic sample of external and intrinsic magnetostatic field has been revealed. In this work, we investigate the possibility for detection of the shape and size of magnetic impurity based on the shape of magnetic domain configuration in magnetic film. We show that due to the influence of magnetostatic field of stripe domain structure in magnetic film on the magnetostatic field of magnetic impurity, one can determine the shape and size of this impurity.

In the present paper the results of a study of new planar composite nanosystems on the basis of complexes formed by amphiphilic polyamine, magnetite nanoparticles, and DNA molecules are presented. Amphiphilic polyamine stearylspermine is synthesized and characterized by the FTIR spectroscopy technique. It is found that a Langmuir monolayer on an aqueous subphase surface can be formed by synthesized stearylspermine molecules. The stearylspermine Langmuir monolayer compression isotherm changes caused by the interaction of a monolayer with colloid magnetite nanoparticles and DNA molecules from the aqueous phase have been studied. The monolayer nanostructures on the surface of mica substrate-Langmuir-Blodgett films of complexes formed by stearylspermine, magnetite nanoparticles, and DNA molecules are formed. The structure of the obtained monolayer films was investigated using the AFM scanning probe technique. Possibilities for the formation of polycomplexes which comprise stearylspermine molecules, functional inorganic nanoparticles, and polymers have been discussed.

The results of investigation of the IR spectra of optical density under the condition of attenuated total internal reflection of acetonitrile in porous glasses with the pores of different radii are presented. It is established that interaction between the acetonitrile molecules and the porous glass matrix with the pores of small dimensions (1.3–4 nm) significantly effects the spectral characteristics of these molecules.

The given work is devoted to the research of distortion of the shape of the isolated stripe domain in the presence of two-dimensional magnetic impurity with sizes of the order of width of this domain. The analysis is based on the developed analytical theory of mixed domain structures. The equation, describing the equilibrium domain wall profile in the vicinity of an elliptical magnetic impurity, had been derived. Calculations were performed for a magnetic film with its parameters typical for the magnetic memory application. The mixed domain structure, consisting of the stripe domains with the elliptical domain at the center of one of them, was nucleated in an iron–garnet film with (2 1 0) orientation. Results of calculations are consistent with experimental observations performed on this film.

It is shown that the ferromagnetic resonance spectrum in (Bi,Tm)3(Fe,Ga)5O12 films grown in Gd3Ga5O12(210) substrates has a single peak. The azimuthal and polar dependences of the resonance field possess 180° symmetry. The angular dependences of the ferromagnetic resonance line width and intensity are studied.

Analytical formulas have been derived to calculate the distortion of the stripe domain structure in a ferromagnetic film under the action of a bubble domain formed in this film. On the basis of the formulas obtained, an experimentally obtained domain configuration has been calculated. The results of the calculation coincide with the observation data within the experimental error.