Phase transitions in bismuth pyrostannate upon substitution of tin by iron ions

JOURNAL OF ALLOYS AND COMPOUNDS

卷:804

Article

Udod, L., V^1,2  Aplesnin, S. S.^1,2  Sitnikov, M. N.²  Romanova, O. B.^1,2,3  Molokeev, M. N.^1,3 

[1] Fed Res Ctr KSC SB RAS, Kirensky Inst Phys, Akademgorodok 50, Krasnoyarsk 660036, Russia

[2] Reshetnev Siberian State Univ Sci & Technol, Krasnoyarsk 660037, Russia

[3] Siberian Fed Univ, Krasnoyarsk 660041, Russia

关键词: Crystal structure;    Domain structure;    Optical properties;    Phase transitions;    Thermal expansion;    Ultrasonics;   

DOI  :  10.1016/j.jallcom.2019.07.020

来源: Elsevier

【 摘 要 】

The Bi-2(Sn1-xFex)(2)O-7 (x = 0, 0.1, 0.2) compounds have been synthesized by the solid-state reaction technique. The structure of the synthesized compounds has been investigated in the temperature range of 80-500 K using the thermal expansion and ultrasound damping coefficients and IR spectroscopy. The shift -type structural transitions for the composition with x = 0.2 in the low-temperature region has been established. The effect of iron ions on the phase boundaries of the polymorphic transitions in the Bi2Sn2O7 compound has been observed. Softening of the phonon modes near the phase transitions at different iron concentrations has been found. (C) 2019 Published by Elsevier B.V.

【 授权许可】

Free