Composition dependence of the phase transition temperature in SrxBa1?xNb2O6

Abstract

The temperature dependence of the spontaneous polarization in strontium-barium-niobate single crystals with varying Sr/Ba ratio is presented. The temperature of the relaxor phase-transition is determined from the inflexion point of the curve of the ferroelectric polarization versus temperature. The influence of the Sr/Ba ratio in the crystal on the transition temperature is discussed within an effective field approach.

Compositional dependence of optical and vibrational properties of strontium barium niobate (SrxBa1–xNb2O6)

“…Pyroelectric measurements [17] have shown that SBN is ferroelectric at room temperature throughout the whole composition range in which SBN crystals can be grown. Recent X-ray diffraction measurements [18] revealed that the ferroelectric phase is tetragonal with space group P4bm.…”

Strontium–barium niobate single crystals, growth and ferroelectric properties

“…Hitherto, the bulk single crystals of SBN of different quality have been grown by the Czochralski and Bridgman techniques [4][5][6][7][8][10][11][12][13][14], also by using Stepanov [15,16], double crucible Stepanov method [17] and floating zone method [18]. The related and pertinent results were presented in classic review of Neurgaonkar et al [2].…”

Investigations on Fe-doped strontium barium niobate, single phase ferroelectric and magnetodielectric compounds

“…9 Therefore, the transition temperature and its diffuseness are critically dependent on the [Sr]/[Ba] ratio and on doping of the SBN by the transition metals or rare earth. 9,10 In general, it is observed that the transition temperature of SBN also depends on particle size and its distribution. 11,12 It is observed that the temperature of dielectric maximum (T m ) at certain frequency decreases with increase in level of substitution.…”