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  1. No Access

    Article

    Oxide Thin Films for Tunable Microwave Devices

    Oxide thin films have been studied for frequency and phase agile electronics. The electric-field tuning of microwave devices employs ferroelectrics, while the Magnetic-field tuning uses ferrites. The critical ...

    X.X. **, Hong-Cheng Li, Weidong Si, A.A. Sirenko, I.A. Akimov… in Journal of Electroceramics (2000)

  2. No Access

    Article

    Soft-mode hardening in SrTiO3 thin films

    Understanding the behaviour of the dielectric constant in ferroelectric thin films remains a challenging problem. These ferroelectric materials have high static dielectric constants, and so are important for t...

    A. A. Sirenko, C. Bernhard, A. Golnik, Anna M. Clark, Jianhua Hao, Weidong Si… in Nature (2000)

  3. No Access

    Article

    Soft-Mode Phonons in SrTiO3 Thin Films Studied by Far-Infrared Ellipsometry and Raman Scattering

    We report the experimental studies of the vibrational spectra of SrTiO3 films with the thickness of 1 ώm grown by pulsed laser deposition. Fourier-transform infrared ellipsometry between 30 and 700 cm−1 and elect...

    A. A. Sirenko, C. Bernhard, A. Golnik, I. A. Akimov… in MRS Online Proceedings Library (1999)

  4. No Access

    Article

    Inelastic scattering of hot electrons by neutral donors in heavily silicon-doped GaAs/AlAs quantum wells

    The energy and momentum relaxation of hot electrons in n-type GaAs/AlAs quantum wells is studied. Hot photoluminescence due to the recombination of hot electrons with holes bound on Si acceptors is observed in st...

    I. A. Akimov, V. F. Sapega, D. N. Mirlin, B. P. Zakharchenya… in Semiconductors (1999)

  5. No Access

    Chapter and Conference Paper

    Dielectric Properties and Applications of Strontium Titanate Thin Films for Tunable Electronics

    The dielectric constant (ε) of ferroelectric materials, such as (Ba,Sr)TiO3 (BST) and SrTiO3 (STO), depends strongly on the applied electric field [1, 2]. This phenomenon has been referred to as the dielectric no...

    X. X. **, Hong-Cheng Li, Weidong Si… in Nano-Crystalline and Thin Film Magnetic Ox… (1999)

  6. No Access

    Article

    In Situ Studies of the Vibrational and Electronic Properties of Si Nanoparticles

    We report onin situ studies of the vibrational properties of ultra-thin Si layers grown by dc magnetron sputtering in ultrahigh vacuum on amorphous MgO and Ag buffer layers. The average thickness of the Si layers...

    J. R. Fox, I. A. Akimov, X. X. **, A. A. Sirenko in MRS Online Proceedings Library (1998)

  7. No Access

    Article

    Fabrication of metal-matrix composites by application of the superplasticity effect

    The production of continuous-fiber metal-matrix composites (MMCs) with improved mechanical properties by solid-state consolidation under superplastic conditions was investigated. The finite-element method was ...

    V. V. Astanin, O. A. Kaibyshev… in Journal of Materials Engineering and Perfo… (1997)

  8. No Access

    Chapter

    Hot Photoluminescence and Electron-Phonon Interaction in GaAs/AIAs MQW Structures

    Energy relaxation of hot electrons by electron-phonon interaction in 2D structures has received much attention in recent years. Not only the confinement of electrons but also the modification of the phonon spe...

    D. N. Mirlin, B. P. Zakharchenya, P. S. Kop’ev… in Hot Carriers in Semiconductors (1996)

  9. No Access

    Article

    On the universal relationship between specific characteristics of superplastic deformation

    A. A. Sirenko, M. A. Murzinova, F. U. Enikeev in Journal of Materials Science Letters (1995)

  10. No Access

    Article

    Loss of strength of boron fibers in interaction with the matrix

    A model of loss of strength of brittle fibers by the products of their interaction with the matrix is proposed. The model is based on the assumption that the rigid products of interaction form with the origina.....

    A. A. Sirenko, G. É. Garipova, V. V. Astanin in Strength of Materials (1993)

  11. No Access

    Chapter

    Photoluminescence of Hot Electrons and Scattering Processes in Quantum-Well Structures

    In earlier work we have observed the optical alignment of 2D-electrons in quantum-well structures, which results in the polarization of hot photoluminescence (HPL) [1]. It was emphasized that the peculiarity o...

    B. P. Zakharchenya, P. S. Kop’ev, D. N. Mirlin… in Laser Optics of Condensed Matter (1991)

  12. No Access

    Chapter

    Geminate Recombination in MQW Structures in a Magnetic Field

    In studies of hot electron photoluminescence in multiple quantum well (MQW) structures [1] we have observed an unusual emission close to the excitation line. This luminescence arises in a magnetic field direct...

    D. N. Mirlin, P. S. Kop’ev, V. F. Sapega, A. A. Sirenko in Laser Optics of Condensed Matter (1991)

  13. No Access

    Article

    Special features of the structure, properties, and failure of plasma-sprayed matrices for boroaluminum

    Compaction of PSA in the conditions simulating the production of FCMs does not result in the properties typical of the standard alloys. The main reason for the reduction of the properties of the PSA are the ox...

    V. V. Astanin, A. A. Sirenko in Soviet Powder Metallurgy and Metal Ceramics (1990)

  14. No Access

    Article

    Effect of the rheological characteristics of the matrix on the formation of a boron-aluminum composite

    V. V. Astanin, A. A. Sirenko, V. N. Nikonov in Mechanics of Composite Materials (1989)