Effect of uniaxial pressure on the ferroelectric phase transition in DTGSe single crystals

Hamed, A. E.

doi:10.1080/01411599208203459

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…Results of recent studies on irradiated TGSe [30] and DTGSe [31] crystals indicate that the character of the phase transition in these crystals tends to be a second-order one. Similar suggestions have been made by Hamed [32] in his recent work on the effect of a small uniaxial pressure applied to 90%-deuterated TGSe crystal along the Z α -axis. An updated short review of the studies on the effect of uniaxial pressure on TGS-type crystals is given in our paper [29] devoted to DTGS crystals.…”

Section: Koralewski Et Alsupporting

confidence: 77%

The effect of uniaxial pressure on the ferroelectric phase transition of TGSe crystals

Koralewski

Stankowska

Iglesias

et al. 1996

J. Phys.: Condens. Matter

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Isobaric studies of the influence of uniaxial pressure on the transitions of pure TGSe crystals for the three directions x, y, z (a * , b, c) are reported. The critical exponents, β, δ and γ , from dielectric constant and hysteresis loop measurements, as well as the coefficients ξ and ζ of the fourth and sixth powers of P in the free-energy expansion under uniaxial pressure were determined. It has been found that uniaxial pressure applied along the a * -axis keeps the transition near a tricritical point for 0 < X < 200 bar, but that when it is applied along the band c-axes it strengthens the second-order phase transition behaviour. The tricritical behaviour of TGSe crystals is discussed and a possible driving mechanism for the change in order of the phase transition is proposed. † We are not concerned here with ferroelastic crystals, for which several examples of a TCP or Lifshitz TCP (LTCP) are known and have been studied both experimentally and theoretically.

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Section: Koralewski Et Alsupporting

confidence: 77%

The effect of uniaxial pressure on the ferroelectric phase transition of TGSe crystals

Koralewski

Stankowska

Iglesias

et al. 1996

J. Phys.: Condens. Matter

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show abstract

“…In the past, much progress in understanding ferroelectrics has been achieved through temperature-, electric field-and/or chemical composition-dependent investigations. The use of pressure for the investigation of ferroelectrics has been relatively rare and was mostly limited to a pressure below 10 GPa [161][162][163][164][165][166][167] or a uniaxial pressure [168][169][170][171][172][173] due to the experimental difficulties, which have persisted in the past. The experimental difficulty in achieving high-(up to 30 GPa) and very highpressure (say 100 GPa) has now been overcome for a number of years, which in turn led to an evolution of high-pressure studies from a "niche" activity reserved to some experts to an increasingly important activity (Figure 3).…”

Section: Effect Of High Pressure On Ferroelectricsmentioning

confidence: 99%