Abstract
It is shown that the softening of the acoustic mode and the ensuing ferroelastic phase transition are due to the linear-quadratic interaction between the symmetric and antisymmetric deformations, which is presently neglected in the literature. An expression is obtained which can be used to predict the phase transition pressure if the initial elastic moduli are known.
Similar content being viewed by others
References
M. T. Dove and S. A. T. Redfern, Am. Mineral. 82, 8 (1997).
G. W. Watson and S. C. Parker, Phys. Rev. B 52, 13306 (1995).
S. A. T. Redfern, Miner. Mag. 60, 493 (1996).
S. V. Goryainov and N. N. Ovsyuk, Pis’ma Zh. Éksp. Teor. Fiz. 69, 431 (1999) [JETP Lett. 69, 467 (1999)].
M. A. Carpenter and E. K. H. Salje, Eur. J. Mineral. 10, 693 (1998).
S. V. Goryainov and N. N. Ovsyuk, Zh. Éksp. Teor. Fiz. 118, 906 (2000) [JETP 91, 786 (2000)].
A. P. Mirgorodsky and M. B. Smirnov, Ferroelectrics 159, 133 (1994).
M. D. McGuinn and S. A. T. Redfern, Miner. Mag. 58, 21 (1994).
Author information
Authors and Affiliations
Additional information
__________
Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 73, No. 8, 2001, pp. 456–459.
Original Russian Text Copyright © 2001 by Gorya\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \)nov, Ovsyuk.