Ultrasonic study of the para-ferroelectric phase transition in phosphate doped TGS crystals

Sreekumar, R.; Philip, J.

doi:10.1080/00150199408007691

Cited by 10 publications

(7 citation statements)

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“…(24) and (26)]. The observations are in good agreement with experimental finding of Bye et al [8] and Shreekumar et al [9] for TGS crystal.…”

Section: Numerical Calculation and Resultssupporting

confidence: 82%

“…The model values of various quantities for TGS crystal are given by Chaudhuri et al [13], Our theoretical results agree with experimentally reported results Bye et al [8] and Shreekumar et al [9] who has studied the effect of electric field on dielectric constant and acoustic attenuation in TGS crystal. It can be seen from our theoretical data that the ferroelectric mode frequency increases with increasing electric field strength [see Eq.…”

Section: Numerical Calculation and Resultssupporting

confidence: 82%

“…Their temperature and electric field dependences are calculated. Theoretical results are compared with experimental results of Bye et al [8] and Shreekumar [9] et al…”

Section: Introductionmentioning

confidence: 94%

“…Bye et al [8] have measured long ago, dielectric constant and spontaneous polarization of TGS crystal in presence of external electric field. Shreekumar et al [9] studied the acoustic dissipation in TGS crystal in external electric fields. Theoretical studies of ferroelectric and dielectric properties of TGS crystal were initiated by Gonzalo et al [10] who used Ising type model.…”

Section: Introductionmentioning

confidence: 99%

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Theoretical Study of Ferroelectric Triglycine Sulphate (TGS) Crystal in External Electric Fields

Upadhyay

Nautiyal

2013

ILCPA

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A modified two sub-lattice pseudospin-lattice coupled mode model of Mitsui et al [Phys. Rev., 111 (1958) 1259] by adding third, fourth order phonon anharmonic interaction and external electric field terms has been applied to ferroelectric triglycine sulphate crystal. Electric field dependence of ferroelectric, dielectric and acoustical properties has been studied. With the help of double time temperature dependent Green's function method, expressions for shift, width, soft mode frequency, dielectric constant, loss tangent and acoustic attenuation have been derived. Numerically calculations have been made and results have been compared with experimental data reported by Bye et al [Ferroelectrics 4 (1974) 243] and Shreekumar et al [Ferroelectrics 160 (1994) 23] for TGS crystal and a good agreement has been observed.

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“…(24) and (26)]. The observations are in good agreement with experimental finding of Bye et al [8] and Shreekumar et al [9] for TGS crystal.…”

Section: Numerical Calculation and Resultssupporting

confidence: 82%

Section: Numerical Calculation and Resultssupporting

confidence: 82%

“…Their temperature and electric field dependences are calculated. Theoretical results are compared with experimental results of Bye et al [8] and Shreekumar [9] et al…”

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Theoretical Study of Ferroelectric Triglycine Sulphate (TGS) Crystal in External Electric Fields

Upadhyay

Nautiyal

2013

ILCPA

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“…A second area has been concerned with developing and testing theoretical models to account for the critical behaviour observed in the ultrasonic properties (velocity and attenuation ) near the ferroelectric phase transition. The third area of work has been concerned with the investigation of the e ects of doping and crystal defects produced by irradiation (with ®rays or X-rays) on the ultrasonic properties of TGS (Strukov et al 1982, 1991, Vindsh et al 1985, Volk et al 1985, Kondratkov and Serdobol'skaya 1988, Sreekumar and Philip 1994. The experimental results obtained are then compared with the predictions made by the selected theory.…”

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confidence: 99%

Ultrasonic study of the elastic and nonlinear acoustic properties of single-crystal triglycine sulphate in the ferroelectric and paraelectric phases

Saunders¹

2000

Philosophical Magazine B

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An experimental ultrasonic study has been made of the elastic and nonlinear acoustic behaviour of single-crystal triglycine sulphate (TGS) in both the ferroelectric and paraelectric phases. The ultrasonic wave velocities for 12 modes of vibration propagated along the [100], [010], [001] and [101] directions have been measured as functions of temperature in the range 293± 338 K, which covers the Curie temperature T C , and hydrostatic pressure up to 0.2 GPa at selected temperatures in the same temperature range. The results provide ten out of the 13 elastic sti ness tensor components C ij of TGS (the exceptions being C 12 , C 23 and C 25 ) and their hydrostatic-pressure derivatives as a function of temperature. Marked anomalies are observed in the C ij …T † in the vicinity of

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60a-1: 6-8 (Nh2ch2cooh)3·h2so4 [F]

Nakatani¹

Organic Crystals, Liquid Crystals and Polymers

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Ultrasonic study of the para-ferroelectric phase transition in phosphate doped TGS crystals

Cited by 10 publications

References 0 publications

Theoretical Study of Ferroelectric Triglycine Sulphate (TGS) Crystal in External Electric Fields

Theoretical Study of Ferroelectric Triglycine Sulphate (TGS) Crystal in External Electric Fields

Ultrasonic study of the elastic and nonlinear acoustic properties of single-crystal triglycine sulphate in the ferroelectric and paraelectric phases

60a-1: 6-8 (Nh2ch2cooh)3·h2so4 [F]

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