Quantum effects at TSCC<sub>1−x</sub>B<sub>x</sub>monocrystals: The influence of an external electric field on the permittivity peak

Windsch, W.; Braeter, H.; Stoiber, Tom

doi:10.1080/07315178408200591

Cited by 2 publications

(1 citation statement)

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“…Detailed investigations are now possible because different influences have been studied, e.g. the influence of an external pressure (Windsch and Schmidt 1980, Fujimoto et a1 1980,1981, Hegenbarth and Schmidt 1980, of an external electrostatic field (Windsch et a1 1984, Stoiber 1984, of the substitution of Cl by Br ions (Van Treeck and Windsch 1978) and of the substitution of H by D in the hydrogen bonds of type N-H ... Cl. For the mixed crystal TSCC~-,B, (c = Cl, B = Br) there exists a critical concentration x,, = 0.73 of Br ions, where the ferroelectric phase transition temperature T, goes to 0 K (Windsch et a1 1983).…”

Section: Introductionmentioning

confidence: 99%

Study of ferroelectric properties of deuterated tris-sarcosine calcium chloride

Gergs¹,

Michel²,

Schlemmbach³

et al. 1986

J. Phys. D: Appl. Phys.

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By means of permittivity, spontaneous polarisation and polarisation reversal measurements the authors studied the influence of the substitution of deuterium atoms for hydrogen on the ferroelectric properties of tris-sarcosine calcium chloride (TSCC). Although most of the protons in the hydrogen bonds were substituted by deuterium (as checked by means of multi-pulse NMR techniques for solids and by infrared spectroscopic measurements) there is no change of the phase transition temperature. By combining density and NMR measurements it could also be shown that the volume of the unit cell did not alter for the various deuterated crystals. The absence of the deuteration effect on Tc and on the parameters of the Landau expansion of Ps suggests that a proton ordering in the hydrogen bond of the type N-H. . .Cl does not occur in practice. This behavior can be understood because the hydrogen bond is rather asymmetric so that the protons occupy predominantly equilibrium positions near the nitrogen atoms. For an interpretation of the results presented the theory of Chaudhury (1982) and co-workers may be applied.

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Section: Introductionmentioning

confidence: 99%