Abstract
Telluric acid ammonium phosphate (TAAP) having the chemical formula Te(OH)6 • 2NH4H2PO 4 • (NH4)2HPO4 undergoes the phase transition at 321 K changing its symmetry from the centrosymmetric class 2/m to the polar class m [1]. Currently most of what is known about the TAAP crystals relates to dielectric properties, little is known about their domain kinetics. The static domain structure has been observed by the etching technique [2]. This method simultaneously reveals the dislocations and other lattice imperfections. The first switching current measurement of ferroelectric polarization reversal in TAAP has been reported in Ref. [3]. Here we communicate the peculiarities of the domain structure dynamics in the TAAP crystals at room temperature.
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