Studies of Phase Transition in LADTGS Crystal with Ultrasonic Method

WANG Ru-Ju; LI Feng-Ying; YAO Yu-Shu; WANG Ji-Fang; LIN Xue-Shi

doi:10.11858/gywlxb.1989.02.009

Volume 3 Issue 2

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Chinese Journal of High Pressure Physics > 1989 > 3(2): 156-158 .

WANG Ru-Ju, LI Feng-Ying, YAO Yu-Shu, WANG Ji-Fang, LIN Xue-Shi. Studies of Phase Transition in LADTGS Crystal with Ultrasonic Method[J]. Chinese Journal of High Pressure Physics, 1989, 3(2): 156-158 . doi: 10.11858/gywlxb.1989.02.009

Citation:

WANG Ru-Ju, LI Feng-Ying, YAO Yu-Shu, WANG Ji-Fang, LIN Xue-Shi. Studies of Phase Transition in LADTGS Crystal with Ultrasonic Method[J]. Chinese Journal of High Pressure Physics, 1989, 3(2): 156-158 . doi: 10.11858/gywlxb.1989.02.009

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Studies of Phase Transition in LADTGS Crystal with Ultrasonic Method

doi: 10.11858/gywlxb.1989.02.009

1.
Institute of Physics, Academia Sinica, Beijing 100080, China;
2.
Shanghai Institute of Technical Physics, Academia Sinica, Shanghai 200083, China

More Information

Corresponding author: WANG Ru-Ju
Received Date: 24 Apr 1989
Rev Recd Date: 24 Apr 1989
Publish Date: 05 Jun 1989

Abstract

Abstract

The variation of the velocity and attenuation coefficient of ultrasonic wave with temperature in LADTGS crystal in the range from 20 ℃ to 90 ℃ under hydrostatic pressure up to 0.8 GPa has been investigated by means of ultrasonic pulse echo overlap techniques. The slope of the curve of the velocity vs temperature breaks at transition temperature. When the pressure is raised, shifting of Tc toward the higher side with a rate of 12 ℃/GPa was observed.
- crystal,
- ultrasonic,
- phase transition,
- high pressure