On the connection between the appearance of two scales and the central peak in the scattering spectra near phase transitions points in crystals
Korzhenevskii A.L.
1
1Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences, St. Petersburg, Russia
Email: alekorzh@mail.ru
The paper proposes a mechanism for the formation of a dynamic central peak observed in scattering spectra as a result of an increase in the size of nuclei on dislocations as the phase transition point is approached. An equation of motion of the interphase boundary for the nucleus is derived, and from its solution an estimate is obtained for the frequency range of the central peak. Keywords: phase transition, central peak, temperature gradient of a local phase transition, equation of motion for a nonstationary phase boundary.
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