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Science Newsletter of the Faculty fo Physics
This is a new bulletin, which, as we hope, will bring fresh, updated information on scientific news, research activities, and related events in the life of our department to our staff members, undegraduate and graduate students, postdocs, collaborators and partners. We greatly hope that this Science Newsletter will help us to find new partners in research and shorten the way from fundamental research to applications and innovations, from our fundamental discoveries to their successful implementations in not too distant future.
XIV National School-Seminar "Wave phenomena in inhomogeneous media"
The conference papers from the School-Seminar «Waves-2014» will be submitted for publishing in the Memoirs of the Faculty of Physics journal.
2013 / 6
R e g u l a r p a p e r s
Radiophysics, electronics, acoustics
I.E. Gospodchikova, V.M. Sarnatsky
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The influence of geometrical dimensions of the yttrium-iron garnet plate (thickness), geometry and intensity of applied bias and alternating magnetic fields on the efficiency of ultrasound generation is researched.
Experiments revealed resonant-dimensional effects, which cannot be described in terms of existing theory. A hypothesis of involvement of domain borders oscillations into ultrasound generation is suggested. Hide Abstract
A.D. Sizov, A.M. Monahov, A.M. Vlasov, D.A. Sechin, G.A. Meshkov
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In our days increased interest in materials that demonstrate the coupling between the magnetic and electrical properties. This work is devoted to the study of one of the manifestations of the magnetoelectric interaction: movement of magnetic domain walls under the influence of an electric field. This effect can find practical applications for new kinds of magnetic storage devices, based on controlled movement of domain walls.
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Optics and spectroscopy. Laser physics
A.S. Shorokhov, K.I. Okhlopkov, D.V. Chichinadze, M.R. Shcherbakov, A.A. Fedyanin
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Ultrafast temporal evolution of the third harmonic generated by a
fishnet metamaterial was studied using the pump-probe technique. The
experimental data indicate the existence of a delay in the nonlinear
response of the metamaterial. The delay is attributed to the
ultrafast relaxation processes in gold characterized by a time
constant of 1 ps that is comparable to the electron-phonon
relaxation time. Hide Abstract
Condensed matter physics
S.V. Kulbachinskii, Ya.G. Ponomarev, I.M. Slobodchikov, L.M. Fisher
Show Abstract
The results of Andreev spectroscopy studies show that in mercury cuprates Hg-1201 (sigle-layer phase) and Hg-1212 (two-layer phase) superconductivity has a single-gap character. Qualitatively different results were obtained for a three-layer phase Hg-1223. In slightly overdoped polycrystalline samples Hg-1223 (Tc = 124 ± 5 K) two superconducting gaps were observed corresponding to one internal (IP) and two outer (OP) CuO2 – planes. The existence of multigap superconductivity in mercury cuprates HgBa2Can-1Cun02n +2 + δ with n ≥ 3 is explained by the difference in doping levels of external (OP) and internal (IP) CuO2 - planes. Hide Abstract
