Bulletin of the Russian Academy of Sciences: Physics最新文献

A study is performed of the magnetic properties of InMnSb films obtained via pulsed laser deposition. The temperature dependences of film magnetization M(T) and the magnetic hysteresis loops M(H) are measured. Analysis of the magnetic data shows that the films consisted of two magnetic subsystems: a ferromagnetic subsystem of MnSb nanoinclusions and a paramagnetic subsystem of dispersed Mn²⁺ ions in the InSb matrix.

The local mobility of the polyvinylpyrrolidone macromolecule was analyzed by IR spectroscopy. The freezing temperature of local molecular mobility was found, and the type of the relaxator was determined. A secondary relaxation transition of polyvinylpyrrolidone was detected at a temperature of 235 K.

A numerical algorithm is obtained for calculating the electron transmission function in an arbitrary potential field in cases of 1D and 2D on the basis of a numerical procedure of searching for the energy levels and eigenwave functions of stationary states. Results are compared to available analytical and numerical solutions. A twisted nanoribbon is investigated as a 2D nanostructure. It is proposed that the obtained results be applied to 2D translation invariant waveguides, in which constants of the propagation guided modes act as energy levels.

Characteristics of proton beams with an energy of 1 GeV are studied using an experimental setup based on a telescope of pixel detectors. Such parameters as pixel cluster multiplicity, beam emittance, and the setup’s resolution in each geometry are investigated.

Results are presented from an experimental and theoretical analysis of the quasi-stationary magnetization reversal of ferrite–garnet films with complex anisotropy. A magneto-optical setup based on the Faraday effect is used to determine conditions that allow reduction of the area of a domain structure. Destruction of the homogeneous magnetization of the magnetic film in four narrow regions relative to one another at right angles is also established. A theory in good agreement with the experimental results is proposed.

Results are presented from modeling the magneto-optical properties of nanoscale layered structures based on a permalloy–tantalum alloy on a silicon substrate. Spectral dependences are calculated using the transverse geometry of the magneto-optical Kerr effect (TKE) in the range of 0.5–4.0 eV. Strong nonlinear behavior of the spectral dependences is established, depending on the thickness of the permalloy–tantalum layer. It is shown that the Kerr effect can be considerably enhanced with sufficiently thick layers of tantalum.

A study is performed of using new materials for the magnetic circuits of the stators and rotors of end-face hysteretic electromechanical energy converters in order to improve their energy performance. The magnetic and hysteretic properties of new stator and rotor materials are investigated. Electromagnetic losses and their effect on the energy indicators of a converter are determined.

A CdTeO₃ film is obtained by implanting ({text{O}}_{2}^{ + }) ions into a single-crystal CdTe/Mo(111) film and annealing for 30 min at Т = 800 K. It is established that the valence band of the CdTeO₃ film reveals three maxima caused by the excitation of electrons from the 5s electrons of Cd, the 2p electrons of O, and the hybridized levels of 5s Cd + 2p O. Cd–Te–O compounds form in the near-surface layer during the implantation of ({text{O}}_{2}^{ + }) ions with E₀ ≥ 10 keV, producing a three-layer CdTe/CdTeO/CdTe nanosystem.