| 1. |
- Lozovoi, AY, et al.
(författare)
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First-principles investigation of thermal point defects in B2NiAl
- 1999
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Ingår i: PHYSICS OF THE SOLID STATE. - : AMER INST PHYSICS. - 1063-7834. ; 41:9, s. 1494-1499
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The equilibrium concentrations of thermal defects are calculated in the mean-field approximation for the configurational entropy. The stable configurations of point defects in NiAl are discussed. (C) 1999 American Institute of Physics. [S1063-7834(99)0200
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| 2. |
- Agekyan, V F, et al.
(författare)
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Effect of a magnetic field on energy transfer of band states to the Mn2+ 3d shell in the CdMgTe matrix with ultrathin CdMnTe layers
- 2010
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Ingår i: PHYSICS OF THE SOLID STATE. - 1063-7834. ; 52:1, s. 27-31
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Tidskriftsartikel (refereegranskat)abstract
- The effect of external magnetic fields on two radiative (band-to-band and on-site) recombination channels in II-VI dilute magnetic semiconductors and related nanostructures has been considered. The 3d on-site emission of manganese ions in CdMgTe matrices containing periodic inclusions of CdMnTe narrow-band-gap layers with thicknesses of 0.5, 1.5, and 3.0 monolayers has been investigated in magnetic fields of up to 6 T. It has been shown that, in a magnetic field, luminescence of manganese ions weakens because of the decrease in the rate of spin-dependent excitation transfer from band states to the Mn2+ 3d shell. The maximum suppression of 3d luminescence has been observed in the matrix with a CdMnTe layer 3.0 monolayers thick. This indicates that the main factor responsible for the energy transfer is the internal field near the CdMnTe layers, which determines the magnetic splitting and spin polarization of band states.
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| 3. |
- Andrievskii, RA, et al.
(författare)
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Nanoindentation and strain characteristics of nanostructured boride/nitride films
- 2000
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Ingår i: Physics of the solid state. - 1063-7834 .- 1090-6460. ; 42:9, s. 1671-1674
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Tidskriftsartikel (refereegranskat)abstract
- The hardness, elastic modulus, and elastic recovery of nanostructured boride/nitride films 1-2 mu m thick have been investigated by the nanoindentation technique under the maximum loads over a wide range (from 5 to 100 mN). It is demonstrated that only the hardness parameters remain constant at small loads (5-30 mN). The data obtained are discussed and compared with the parameters determined by other methods. (C) 2000 MAIK "Nauka/Interperiodica".
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| 4. |
- Baykov, Vitaly, et al.
(författare)
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Ab Initio Studies of the Energy Characteristics and Magnetic Properties of Point Defects in GaAs
- 2005
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Ingår i: Physics of the solid state. - : Pleiades Publishing Ltd. - 1063-7834 .- 1090-6460. ; 47:10, s. 1831-1836
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Tidskriftsartikel (refereegranskat)abstract
- The formation energies of intrinsic point defects and solution energies of transition metal impurities in gallium arsenide are determined on the basis of ab initio calculations using the method of a locally self-consistent Green's function, which is a generalization of the coherent potential approximation. Based on the calculated energies, the conclusion is made that the As-Ga antisite defect is the most common intrinsic defect in GaAs. Calculations showed that transition metal impurities, except for Ni, preferentially occupy gallium sites substitutionally. The magnetic moments of impurity atoms are calculated as a function of the chemical environment. It is shown that, in compensated GaAs, Mn atoms tend to form clusters.
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| 5. |
- Belov, Maxim, et al.
(författare)
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Hydrogen in palladium: Anharmonicity of lattice dynamics from first principles
- 2015
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Ingår i: Physics of the solid state. - : M A I K Nauka - Interperiodica. - 1063-7834 .- 1090-6460. ; 57:2, s. 260-265
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Tidskriftsartikel (refereegranskat)abstract
- The interaction potentials of the palladium and hydrogen sublattices at different hydrogen concentrations have been obtained in terms of the density functional theory and ab initio pseudopotentials. It has been shown that the anharmonicity of this interaction depends on the hydrogen concentration. The phonon spectrum of palladium hydride PdH has been calculated in the harmonic approximation and taking into account the anharmonic effects. The temperature-dependent effective potential technique accounting for the anharmonic effects of lattice vibrations has been described.
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| 6. |
- Belov, M P, et al.
(författare)
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Hydrogen in the approximant i-TiZrHf: The energy state, charge, and diffusion
- 2010
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Ingår i: PHYSICS OF THE SOLID STATE. - : Springer Science Business Media. - 1063-7834. ; 52:6, s. 1111-1114
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Tidskriftsartikel (refereegranskat)abstract
- The energy of hydrogen dissolution in different tetrahedral pores of a 1/1 approximant of the icosahedral TiZrHf quasicrystal has been determined in terms of the density functional theory and ab initio pseudopotentials. At low and high degrees of loading of TiZrHf with hydrogen, the charges of atoms involved in the system and the Mayer bond order have been calculated for all possible M-M and M-H pairs. The diffusion coefficient of a single hydrogen atom in the system under study has been estimated numerically.
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| 7. |
- Bessarab, Pavel F., et al.
(författare)
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Layer-Heterogeneous Magnetic States in Metallic Nanosystems
- 2009
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Ingår i: Physics of the solid state. - : Pleiades Publishing. - 1063-7834 .- 1090-6460. ; 51:1, s. 150-155
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Tidskriftsartikel (refereegranskat)abstract
- The formation of layer-heterogeneous periodic magnetic states in metallic systems is explained in terms of the dependence of the energy of itinerant electrons on the magnetic ordering of localized spins. The interaction of the local magnetic moments with conduction electrons with a certain spin projection is described by a set of spin-dependent delta-function potentials. A matrix method is developed permitting one to calculate the energy spectrum and the density of states of itinerant electrons in the presence of a layered magnetic heterogeneity. This method is used to explain oscillations of the interlayer exchange interaction in metallic magnetic superlattices and the stabilization of spin-density wave structures in transition metals and alloys.
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| 8. |
- Bleskov, I D, et al.
(författare)
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Electronic structure and ground state parameters of Ru1-x Me (x) Al refractory alloys
- 2010
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Ingår i: PHYSICS OF THE SOLID STATE. - : Springer Science Business Media. - 1063-7834. ; 52:9, s. 1803-1809
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Tidskriftsartikel (refereegranskat)abstract
- The electronic structure and ground state parameters of B2 RuAl-based refractory alloys have been investigated in the framework of the density functional theory using the exact muffin-tin orbital method in combination with the coherent potential approximation. It has been demonstrated that the number of states at the Fermi level for the Ru1 - x Me (x) Al alloys as a function of the alloying metal content has a minimum, which indicates a change in the Fermi surface topology and the presence of specific features in the behavior of elastic constants. It has been concluded that the electronic structure of the alloys can be described in terms of the rigid band model. The nonlinear variations of the lattice parameters of the alloys has been explained.
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| 9. |
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| 10. |
- Boikov, Iouri, 1949, et al.
(författare)
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Dielectric response of Ba0.05Sr0.95TiO3(110) films to variations in temperature and electric field
- 2015
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Ingår i: Physics of the Solid State. - 1063-7834 .- 1090-6460. ; 57:5, s. 957-961
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Tidskriftsartikel (refereegranskat)abstract
- Three-layer epitaxial heterostructures, in which a 1000-nm-thick intermediate layer of Ba0.05Sr0.95TiO3 is integrated with strontium ruthenate conducting electrodes, have been grown by laser evaporation. Using photolithography and ion etching, film parallel-plate capacitors SrRuO3/Ba0.05Sr0.95TiO3/SrRuO3 are formed based on the grown heterostructures. A sharp maximum in the temperature dependence of the capacitor capacitance is observed at T ≈ 75 K. At T 250 K and the measuring signal frequency of 1 kHz, the dielectric loss tangent of the film capacitors increases exponentially with increasing temperature.
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