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Yekaterinburg, Russia

The Ural Federal University named after the first President of Russia B. N. Yeltsin is one of the leading educational institutions in the Ural region. Ural Federal University acts as a research and innovation center of the Ural region, has close cooperation with the Russian Academy of science. Training of students is carried out in three main directions and 67 academic majors. The links between the university and intermediate and elementary educational institutions are developed. The University performs consistent work on establishing strategic partnership with employers for the development of the regional economy: employers are involved in the educational environment as direct participants, large-scale target preparation of students and corporate education are carried out on the basis of the client-centered approach, joint business projects in economic and social activity are realized. Wikipedia.

Moskvin A.S.,Ural Federal University
JETP Letters | Year: 2012

Circulating current loops within the cuprate unit cell are proposed to play a key role in the physics of the pseudogap phase. However, main experimental observations motivated by this sophisticated proposal and seemingly supporting the circulating current model can be explained within a simple and physically clear microscopic model. It has been argued that, instead of a well-isolated Zhang-Rice (ZR) singlet 1A 1g, the ground state of the hole center [CuO 4] 5- (cluster analog of Cu 3+ ion) in cuprates should be described by a complex 1A 1g- 1,3B 2g- 1,3E u multiplet, formed by a competition of conventional hybrid Cu 3d-O 2p b 1g(σ)∝ d x2-y2 state and purely oxygen nonbonding O 2pπ states with a 2g(π) and e ux, y(π) symmetry. In contrast to inactive ZR singlet we arrive at several novel competing orbital and spin-orbital order parameters, e. g., Ising-like net orbital magnetic moment, orbital toroidal moment, intra-plaquette's staggered order of Ising-like oxygen orbital magnetic moments. As a most impressive validation of the non-ZR model we explain fascinating results of recent neutron scattering measurements that revealed novel type of magnetic ordering in pseudogap phase of several hole-doped cuprates. © 2012 Pleiades Publishing, Ltd. Source

Streltsov S.V.,Ural Federal University
Physical Review B - Condensed Matter and Materials Physics | Year: 2013

An unusual orbital state was recently proposed to explain the magnetic and transport properties of Ba3CoRu2O9. We show that this state contradicts the first Hund's rule and does not realize in the system under consideration because of a too small crystal-field splitting in the t2g shell. A strong suppression of the local magnetic moment in Ba3CoRu2O9 is attributed to a strong hybridization between the Ru 4d and O 2p states. © 2013 American Physical Society. Source

Zubarev A.Yu.,Ural Federal University
Soft Matter | Year: 2012

The paper deals with theoretical study of deformation of a ferrogel sample under the action of an applied magnetic field. The main goal of this work is to determine the type of deformation - either elongation or contraction in the field direction. To answer this question and to avoid artificial conclusions, we have estimated the free energy of the deformed sample by using standard methods of statistical physics. The analysis shows that the type of magnetically induced deformation significantly depends on initial shape of the sample, the applied magnetic field, as well as on the concentration and magnetic properties of the magnetic particles embedded in the gel. © 2012 The Royal Society of Chemistry. Source

Zubarev A.Yu.,Ural Federal University
Colloid Journal | Year: 2012

The influence of homogeneous correlations between the positions and orientations of ferroparticles on the effect of light birefringence in magnetic fluids has been studied. It has been demonstrated that, for typical magnetic fluids, the optical effects associated with the homogeneous correlations can be stronger than the effects caused by elongated primary aggregates formed at the stage of ferrofluid synthesis, as well as heterogeneous chains resulting from magnetic attraction between the largest particles of a magnetic fluid. © 2012 Pleiades Publishing, Ltd. Source

Zubarev A.Yu.,Ural Federal University
Soft Matter | Year: 2013

This paper deals with a theoretical study of the effect of chain-like heterogeneous structures on the type of deformation of ferrogel under an applied magnetic field. The analysis shows that depending on the energy of magnetic interaction between the particles, these chains can stimulate either elongation or contraction of the sample along the field. © The Royal Society of Chemistry 2013. Source

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