Mys O. Criticality of behaviour of the optical-physical properties of ferroelectrics Sn2P2S6 and Sn2P2(Se0,28S0,72)6 (p,T,x - phase diagram of solid solutions Sn2P2(SexS1-x)6)

Українська версія

Thesis for the degree of Doctor of Science (DSc)

State registration number

0513U000420

Thesis Registration Form

0513U000420.pdf

Applicant for

Specialization

  • 01.04.07 - Фізика твердого тіла

02-04-2013

Specialized Academic Board

Д 35.071.01

Vlokh Institute of Physical Optics

Essay

On the basis of study of acoustic, optical, and thermomechanical properties of crystals that belong to the Sn2P2(SexS1-x)6 family the problem of special points on p,T,x - phase diagram is solved and the high efficiency materials were proposed for optical radiation control. The tricritical point at p,T - phase diagram of Sn2P2S6 crystals has been revealed (pTC = 4.3 kbar and TTC = 259 K). It was argued that on the p,T,x - phase diagram of Sn2P2(SexS1-x)6 solid solutions there are two special lines of phase transitions, namely line of tricritical points and the line of triple points. A new efficient acoustooptic, magnetooptic and electrogyration materials based on Sn2P2S6 crystal are proposed.

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Dis.pdf

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