Научные публикации в Scopus: Recent submissions

Now showing items 17401-17420 of 24551

Temperature dependence of the spin susceptibility of layered cuprates in the pseudogap phase: Comparison with the knight shift data for the Cu(2) site in YBa2Cu4O8 and Bi2Sr 2CaCu2O8 + x

Andreeva E.; Andreev A.; Eremin M. (2010)

The temperature dependences of the Knight shift at the Cu(2) site in YBa2Cu4O8 and Bi2Sr 2CaCu2O8 + x compounds were analyzed based on the band structure parameter extracted from photoemission data. Different scenarios for ...
Experimental observation of the spin screening effect in superconductor/ferromagnet thin film heterostructures

Garifullin I.; Garif'yanov N.; Salikhov R.; Tagirov L. (2010)

When studying the nuclear magnetic resonance (NMR) of 51V nuclei in superconductor/ferromagnet thin film heterostructures, anomalous behavior of the NMR signal was observed. This effect was manifested as a systematic ...
Determination of the lamb-Mössbauer factor by the delayed coincidence technique

Vagizov F.; Sadykov E.; Kocharovskaya O. (2010)

A method for determining the Lamb-Mössbauer factor by means of the delayed coincidence technique is proposed. The effective thickness of a series of K4Fe(CN)6 · 3H2O samples was measured and recoilless fraction f = 0.339 ...
Investigating the magnetic structure and anisotropic Pr-Fe exchange interaction in a PrFe3(BO3)4 single crystal by optical spectroscopy

Stanislavchuk T.; Popova M.; Malkin B.; Bezmaternykh L. (2010)

Optical spectroscopy was used to obtain information on the energy and symmetry of the crystal-field (CF) levels within the 4f 2 configuration of Pr3+ in PrFe3(BO3) 4, along with changes in the frequencies and intensities ...
Lamb shift in atoms interacting with a strong laser field

Gainutdinov R.; Mutygullina A. (2009)

Radiative corrections to the energy levels of an atom interacting with a strong laser field have been investigated. A formula for the Lamb shift of the laser-dressed states is derived, which makes it possible to calculate ...
Generation of narrow-band correlated photon pairs by spontaneous down conversion in a cavity

Latypov I.; Kalinkin A.; Shkalikov A.; Kalachev A.; Samartsev V. (2009)

The problem of generating a narrow-band biphoton field during spontaneous parametric down conversion of light in a quadratic nonlinear medium in a cavity is discussed. It is shown that, in the case of double resonance (for ...
Peculiarities of femtosecond photon echo signals in dye-doped polymer films at high temperatures

Zuikov V.; Vorobyev A.; Lobkov V.; Leontiev A.; Salikhov K.; Samartsev V.; Safiullin G. (2008)

Some results of femtosecond echo experiments on polyvinylbutyral polymer films doped with phtalocyanine molecules at high (up to room) temperatures are reported. Special attention is paid to the stimulated femtosecond ...
Formation of photonic echo signals in the presents of a strong concentration quenching effect

Zuikov V.; Kalachev A.; Karimullin K.; Samartsev V.; Tiranov A. (2009)

The connection between the photonic echo formation in crystals doped by rare-earth elements and the concentration effects was studied. The application of optical echo spectroscopy in studies of garnet crystals with a high ...
Stimulated photon echo with temporal data coding in the Hopfield-Little regime

Vorobieva V.; Kalachev A.; Samartsev V. (2009)

A model of an optical neural network with associative memory using stimulated photon echo (SPE) with temporal data coding is presented. The electrical field's calculation of the SPE signals is carried out for case of ...
Reentrant superconductivity in superconductor-ferromagnetic-alloy bilayers

Zdravkov V.; Sidorenko A.; Obermeier G.; Gsell S.; Schreck M.; Müller C.; Ryazanov V.; Horn S.; Tidecks R.; Tagirov L.; Kupriyanov M. (2008)

Oscillating behavior of superconductivity in ultrathin bilayers of niobium and ferromagnetic alloy Cu41Ni59 has been observed. This phenomenon was most pronounced at a Nb layer thickness of about 7.3 nm: the superconducting ...
Quantum memory based on optical subradiance: Optimization of the signal-to-noise ratio

Kalachev A. (2008)

A scheme for creating subradiant states in an extended system of atoms, based on the use of an external inhomogeneous electric field, is proposed. It is shown that the maximum signal-to-noise ratio at the output of a quantum ...
Nonlocality of interaction and quantum Zeno paradox

Gainutdinov R.; Mutygullina A. (2008)

The short-time behavior of the evolution operator has been investigated in the context of the quantum Zeno paradox. It is shown that the nonlocality during interaction in a quantum system radically changes the short-time ...
Incoherent photon echo in spectroscopy of optically dense impurity media

Zuykov V.; Karimullin K.; Mitrofanova T.; Samartsev V.; Shegeda A.; Shkalikov A. (2008)

The possibility of using incoherent photon echo in spectroscopy of optically dense impurity media is considered. A theoretical approach to description of this phenomenon is presented. The experimental data on incoherent ...
Anti-Stokes femtosecond photon echo in dye-doped polymer films and the possibility of coherent optical cooling

Vorobyev A.; Petrushkin S.; Samartsev V. (2008)

An anti-Stokes model is proposed to explain the known experimental data on the femtosecond photon echo in dye-doped polymer films at room temperature. The possibility of implementing the anti-Stokes mode of coherent laser ...
Femtosecond photon echo in dye-doped polymer films at room temperature

Samartsev V. (2008)

The signals of primary and stimulated femtosecond photon echo in polymer films doped with dye (phthalocyanine) molecules have been experimentally investigated at room temperature. A femtosecond echo spectrometer for these ...
Optimal conditions for exciting long-lived photon echo signals in impurity nanocrystals

Vlasova D.; Kalachev A. (2008)

The specific features of the formation of long-lived photon echo signals in dielectric nanocrystals doped with rare earth ions have been considered. It is shown that the optimal situation for observing long-lived photon ...
Quantum interference effects of γ radiation under crossing-anticrossing of nuclear levels in an RF field

Bashkirov S.; Lyubimov V.; Popov E.; Belavin V.; Kutsenko S. (2007)

The quantum interference effects occurring in resonant scattering of a γ photon in the multilevel γ-optical medium 57Fe, affected by an external RF field, have been theoretically investigated. It is shown that a significant ...
Controllable quantum interference in Mössbauer spectroscopy: "valve" effect

Sadykov E.; Arinin V.; Vagizov F.; Kocharovskaya O. (2007)

A possibility of redistribution of line intensities in the spectrum of resonant Mössbauer scattering due to the RF-stimulated quantum interference of the spectroscopic amplitudes is shown. The three-level Σ scheme in the ...
Mössbauer spectrometer providing measurement of spectral dependences on external parameters

Dulov E.; Ivoilov N.; Khripunov D. (2007)

A method of simultaneous measurement of Mössbauer spectra for a set of discrete values of an external parameter is proposed. The method proposed makes it possible to simplify series measurements and replaces a number of ...
Effective interaction of a photon with a strong laser field

Gainutdinov R.; Mutygullina A.; Khamadeev M. (2008)

The problem of nonlocality of effective interaction of radiation field with a strong classical electromagnetic field has been investigated. The interaction operator allowing one to take into account the natural nonlocality ...

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