Phase Diagram and Soft Modes Behavior TbFe3–xGax(BO3)4 Solid Solutions with Huntite Structure.

Authors :: Krylov, A. S.
Vtyurin, A. N.
Gudim, I. A.
Nemtsev, I. V.
Krylova, S. N.
Source :: Optics & Spectroscopy; Sep2023, Vol. 131 Issue 9, p840-848, 9p
Publication Year :: 2023
Abstract: The Raman spectra of four crystals of TbFe<subscript>3–x</subscript>Ga<subscript>x</subscript>(BO<subscript>3</subscript>)<subscript>4</subscript> solid solutions (x from 0 to 0.54) were studied in the temperature range from 8 to 350 K. The temperatures of structural phase transitions were determined. The observed spectral behavior is characteristic to condensation and restoration of soft modes. Soft modes are associated with a structural phase transition from the R32 phase to the P3<subscript>1</subscript>21 phase. The Compositions-Temperature phase diagram was constructed. [ABSTRACT FROM AUTHOR]

Subjects :: PHASE diagrams
RAMAN spectroscopy
CONDENSATION
PHASE transitions

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