Aging, rejuvenation, and memory effects in the domain state of Sr_0.75Ba_0.25Nb₂O₆

Glassy Phenomena in Relaxor Ferroelectrics

“…10.9a shows the relaxor-typical frequency dispersion of the ac susceptibility v 0 (T) for frequencies 10 -2 B f B 10 5 Hz, where the peak temperature, T m (f), is systematically shifting toward lower temperatures as shown in a semi-logarithmic plot in Fig. 10.9b [53]. The data within the temperature interval 325.5 B T B 335.5 K (rightmost up arrows) are best fitted to the activated dynamic scaling law of the RFIM [54],…”

“…This is accomplished by a classic stop-and-wait procedure as shown in Fig. 10.9c, d [53]. Aging of the susceptibility components v 0 (c) and v 00 / v 0 (d) of SBN75 is recorded versus T after zero-field cooling (ZFC) from T = 450 K at rates dT/dt = ±0.2 K min -1 and frequency f = 100 Hz, on first cooling to halt for 118 h at the wait temperature T w = 295 K (curves 1 and 2, respectively), continuous reheating to 310 K (curve 3), and subsequent continuous cooling back to 280 K. The dotted line refers to continuous cooling from 450 K under identical cooling rate.…”

Phase transition of the uniaxial disordered ferroelectric Sr0.61Ba0.39Nb2O6

“…The value of P s at saturation and the critical exponent β depend on how the poled state is prepared [7], [8]. Moreover, both rejuvenation and memory effects are observed in the ferroelectric state of SBN [7], [9]. Both these properties are characteristic of glasses rather than that of the ordered crystals.…”

Structural Transformations in Ferroelectrics Discovered by Raman Spectroscopy

“…The uniaxial relaxor ferroelectric SBN, which is of particular interest due to its well-known pyroelectric, electro-optic, and non-linear optical properties, has some potential applications such as holographic data storage, and generation of photorefractive solitons [21]. The aim of this part is to investigate the lattice vibration of the Sr x Ba 1Àx Nb 2 O 6 ceramics with different Sr/Ba ratios studied by Raman spectroscopy.…”