K. Lapsa et al., Study of the elastic properties of glycine phosphite crystals (Gly center dot h(3)PO(3)) by Brillouin scattering, FERROELEC L, 25(5-6), 1999, pp. 129-133
The results concerning the elastic properties of glycinium phosphite (GPI)
crystals obtained by Brillouin scattering method are reported. The temperat
ure measurements of the relative change Delta V/V of the phase velocity for
acoustic modes propagating in q = [100], q = [010], q = [110] and q = [011
] directions have been performed in the temperature range 300 K - 170 K. Ob
tained results confirm the existence of the ferroelectric phase transition
(P2(1)/a - P2(1)) at 224 K.