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  • 1985-1989  (3)
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Publisher
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Influence of elastic fields generated by point defects on the physical properties of matter (1985)
    Springer
    Russian physics journal 28 (1985), S. 846-848 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The influence of defects on the physical properties of matter in the vicinity of the points of structural phase transitions was investigated in the papers of A. P. Levanyuk et al. They took into account only one property of the defect: the capability of fixing the order parameter at the point of its occurrence. The electric fields generated by a point defect are, of course, not taken into account in such an approach. In the present study, the influence of the elastic fields generated by point defects on the behavior of the heat capacity in the vicinity of the second-order phase transition and on the absorption of sound are investigated. It is shown that consideration of the elastic fields leads to the same anomalies of thermodynamic characteristics as in the papers of Levanyuk.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00897963
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Retardation of dislocations by the Cherenkov mechanism in crystals with a soft mode (1988)
    Springer
    Russian physics journal 31 (1988), S. 1002-1006 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The retardation mechanism of dislocations in crystals with a soft mode on account of Cherenkov emission of soft optical phonons is considered in the present work. The conditions in which this retardation mechanism appears are examined for various orientations of the wave vector qc characterizing structural phase transition. It is shown that the threshold velocity of the retardation mechanism in the case where qc¦V (V is the velocity of motion of the dislocations) decreases on approaching the phase-transition temperature Tc in proportion to ¦tc−Tc¦. The dependence of the dynamic retardation coefficient B on the velocity V and the closeness to the point of structural phase transition is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01101171
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  • 3
    Electronic Resource
    Electronic Resource
    Piezoelectric properties of crystals (1989)
    Springer
    Russian physics journal 32 (1989), S. 127-131 
    Details
    ISSN: 1573-9228
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A microscopic derivation of the tensor of piezoelectric moduli is presented. The piezoelectric coefficients are expressed through the natural frequencies ωα(κ) and polarization vectorse s α (κ) associated with vibrations of the crystalline lattice.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00898675
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    Paper (German National Licenses)
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