by Timothy G. Taylor
Abstract:
Ultrasonic velocity measurements were performed on a single CsNiCl3 crystal over a temperature range of 4.0 K to 300 K. Phase transitions were observed at 4.10 K and 4.66 K. The temperatures at which these phase transitions occurred both rose linearly as the pressure was increased up to 7.1 kbar. The relative contribution of magnetoelastic coupling to the sound velocity was also analyzed and found to have a maximum contribution at 42 K, which scales well with the value of the interchain exchange parameter J|| along the c-axis. The maximum of the magnetoelastic coupling contribution also rose linearly as the pressure was increased.
Reference:
Timothy G. Taylor, "Ultrasonic study of the P-T phase diagrams of the CsNiCl3 crystal", 1998.
Bibtex Entry:
@bachelorsthesis{1998T,
title={Ultrasonic study of the P-T phase diagrams of the CsNiCl<sub>3</sub> crystal},
author={Timothy G. Taylor},
month={June},
year={1998},
abstract={Ultrasonic velocity measurements were performed on a single CsNiCl<sub>3</sub> crystal
over a temperature range of 4.0 K to 300 K. Phase transitions were observed at 4.10 K
and 4.66 K. The temperatures at which these phase transitions occurred both rose
linearly as the pressure was increased up to 7.1 kbar. The relative contribution of
magnetoelastic coupling to the sound velocity was also analyzed and found to have a
maximum contribution at 42 K, which scales well with the value of the interchain
exchange parameter J<sub>||</sub> along the c-axis. The maximum of the magnetoelastic
coupling contribution also rose linearly as the pressure was increased.},
note={Supervised by G. Quirion}
}