Magnetic Gradient edge magnetoplasmons in non-uniform magnetic field

We have theoretically studied two-dimensional electron gas placed in a strong laterally non-uniform magnetic field, which appears due to ferromagnetic film . We have found, that in this case 2DEG experiences static charge redistribution that strongly depends on presence and configuration of the gates on the surface of a heterostructure. Also, it is shown that lateral inhomogeneity of a strong magnetic field allows itself “magnetic gradient” or “magnetic-edge” magnetoplasmons due to complex lateral structure of magnetic field gradient. This mechanism is different from usual “density gradient” edge magnetoplasmons [2]. We have investigated two families of different-chirality modes localized near the edge of the magnetic film. Each chirality’s mode family at small wave vector has one fundamental state with logarithmically large phase velocity.Ciência e a Tecnologia (FCT

Oxidatively modified carbon as efficient material for removing radionuclides from water

© 2017 Elsevier LtdThere is a constant need to develop advantageous materials for removing radioactive waste from aqueous systems. Here we propose a new carbon-based material prepared by oxidative treatment of various natural carbon sources. The as-prepared oxidatively modified carbon (OMC) has an oxygen-rich surface, and retains its particulate granular texture. It has relatively low cost and can be used in traditional filtration columns. The sorption ability of OMC toward several metal cations is demonstrated. It is especially efficient toward Cs+ cations, the species that are among the most difficult to remove from the waters at the Fukushima nuclear plant

Synthesis of hyperbranched polyester polymaleic acids third generation

The third generation hyperbranched polyesterpolyol has been modified with maleic anhydride at various ratios of the polyol to the modifying agent, from 1: 6 to 1: 18. The prepared modified polyols are capable of the complex formation with copper(II), cobalt(II), and nickel(II) ions. © 2013 Pleiades Publishing, Ltd

Frozen superparaelectric state of the local polar domains in GdMn2O5 and Gd0.8Ce0.2Mn2O5

This work was supported by RFBR (Grant N 18-32-00241)