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  • 74.00  (1)
  • 76.80  (1)
  • 1
    ISSN: 1432-0630
    Keywords: 76.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In the present work we have used the Mössbauer effect to investigate the dependence of the second-order Doppler shift on temperature for one sample ofβ-Ti (Fe) alloy with 9.3 at.% Fe. The experimental data of total shift of the Mössbauer line in a temperature interval between 4K and 975 K were fitted to theoretical expressions obtained by assuming the Debye approximation to describe the lattice and a more general approximation for high temperature, which take into account the difference in mass of the impurity atom and that of the host lattice. From the fitting we have obtained that the Ti-Fe interatomic forces are larger than that of Ti-Ti.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 44 (1987), S. 101-104 
    ISSN: 1432-0630
    Keywords: 74.00
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A model is proposed based on electron hopping between octahedral Cu2+ and Cu3+ ions. Exchange interaction is assumed to be an electron-exciton one. Ground-state excitons are formed by freeze-in of the hopping process. The model is able to explain the main phenomena observed in the new high-T c superconductors.
    Type of Medium: Electronic Resource
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