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RESEARCH PRODUCT

Raman Studies of Structural Phase Transitions in Perovskite Ferroelectric Sodium Niobate Solid Solutions

K. BormanisN. V. SidorovV. JefremovVismants ZaulsM. N. Palatnikov

subject

Phase transitionStructural phaseMaterials scienceCondensed Matter PhysicsFerroelectricityElectronic Optical and Magnetic MaterialsCrystalCondensed Matter::Materials Sciencesymbols.namesakeCrystallographyPhase (matter)symbolsRaman spectroscopyPerovskite (structure)Solid solution

description

Raman spectra are sensitive to interactions between structural units and, consequently, may reflect fine rearrangements of the units of cation sublattice occuring at compositional changes affecting the phase equlibrium and ferroelectric properties of the crystal. Obtaining Raman spectra show the information on disordering of structural units depending on composition of the cation sublattice in real Li x Na 1 − x Ta y Nb 1 − y O 3 ferroelectrics. On the basis of experimental studies shown, that not only the frequency but also intensity of some “rigid” bands may serve as the function of order parameter of phase transition in Landau's theory of the second order phase transition.

yearjournalcountryeditionlanguage
2008-10-21Ferroelectrics
https://doi.org/10.1080/00150190802365699