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Antiferroelectric ADP doping in ferroelectric TGS crystals
Arunmozhi, G.; Lanceros-Méndez, S.; Gomes, E. de MatosCrystal growth, morphology, hysteresis and dielectric measurements on 20 mol% ammonium dihydrogen phosphate (ADP)doped triglycine sulphate (TGS) crystals are reported. Crystals grew with morphology similar to phosphoric acid-doped TGS (TGSP). Inhomogeneous incorporation of dopants gives rise to a distribution in coercive fields in the different growth sectors. The incorporated dopant hinders polarization switch...
Dielectric relaxation in pure and irradiated TGSP crystals
Arunmozhi, G.; Lanceros-Méndez, S.; Gomes, E. de MatosLow frequency dielectric measurements in triglycine sulpho-phosphate (TGSP) and gamma-irradiated TGSP crystals were carried out around the ferroelectric to paraelectric phase transition. The dispersion found in the ferroelectric phase cannot be explained only by a Debye equation with a single relaxation time. The ratio of the Curie constants in the para- and ferroelectric phase (C-p/C-f) for the irradiated TGSP...
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