Calculation of the properties of a lens made of glass bricks by the equivalent-current method

The properties of a lens antenna are calculated by the equivalent-current method (second equivalence principle). A Luneberg lens formed by glass bricks is considered. The results of these calculations are compared with experimental data. The possibility is considered of applying the above theoretical method to calculating lens antennas where there is a random deviation of the dielectric constant from a preset distribution.     

Special Features of Functional Properties of Heterophase High-Strength Ni50.2Ti37.3Hf12.5 Polycrystals and Single Crystals

Russian Physics Journal - Stress-induced B2–B19' martensitic transformations (MTs) in Ni50.2Ti37.3Hf12.5 (at.%) alloy aged at 773 K, 3 h are studied. Single crystals have lower (by 100 K)...     

Magnetocaloric effect near the first-order phase transitions in compounds of rare earth and transition metals

The results of the calculations and the experimental values of the magnetocaloric effect (MCE) in a group of compounds that are promising for use in magnetic coolers are reported. In the materials studied, MCE reaches the largest values near the magnetic first-order phase transitions and is mainly determined by the evolving latent heat of the transition. Contributions of different processes, occurring at the first-order phase transitions, to the observed MCE value have been separated on the basis of the thermodynamic model.     

Local magnetic properties of Fe3(CrxCo1−x) ferromagnetic alloys

Both experimental and theoretical methods are used to obtain information on the local magnetic moments of atoms of all components of Fe-Cr-Co ferromagnetic alloys, which are important in practice.Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 11, pp. 5–10, November, 1989.     

The Elastocaloric Effect in [001]-Single Crystals of Titanium Nickelide Containing Nanosized Ti3Ni4 Particles

Russian Physics Journal - The temperature dependence of the elastocaloric effect is studied and the experimental values of the adiabatic temperature change, ΔTad, in the loading/unloading...     

Relationship Between Physical and Mechanical Properties of a Polymer Composite and Fractal Dimension of Structural Elements of its Surface

Russian Physics Journal - The paper shows the promising use of the “fractal dimension” parameter for qualitative and quantitative analysis of the surface structure of samples based on...     

Measuring Transport Numbers for Lithium Isotopes in the Li3AlN2 Solid Electrolyte

Transport numbers of the ⁶Li and ⁷Li ions in solid electrolyte Li₃AlN₂ are estimated by passing a constant current and measuring their concentration distribution at 300°C. Up to [⁶Li] = 50–55 at. %, the ⁷Li ions are more mobile.