Dynamics of Ferroelectric Rochelle Salt

Dynamics of the Rochelle salt NaKC_{4}H_{4}O_{6}·4H_{2}O crystal studied within the Mitsui model extended by piezoelectric interaction and transverse field

“…We consider the model with transverse field but neglect transverse relaxation of the pseudospin (1/T 2 = 0). Analogous model, but without piezoelectric interaction was considered earlier [16]. It should be noted that in paraelectric phase, piezoelectric interaction just effects the value of σ z but does not change the analytic formula for the relaxation time.…”

“…However, linear dependence is valid only for large T 1 and is not valid in general case. Besides, the expression for relaxation time of [16] contains an error. In the Appendix we present the correct results for the relaxation time.…”

“…Zekš [16] obtained the expression for relaxation time in paraelectric phase within the Mitsui model with transverse field, though without piezoelectric interaction. The study was carried out within Bloch equation method at 1/T 2 = 0.…”