Paraelectric and ferroelectric phases of betaine phosphite: Structural, thermodynamic, and dielectric properties

Fehst, I.; Paasch, M.; Hutton, S. L.; Braune, M.; Böhmer, Roland; Loidl, A.; Dörffel, M.; Narz, Th.; Haussühl, S.; McIntyre, Garry J.

doi:10.1080/00150199308017710

Cited by 77 publications

(47 citation statements)

References 28 publications

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“…The anti ferrodistorsive phase transition is observed in BPI at 355 K and in BP at 365 K (the symmetry change is P2 1 /m → P2 1 /c) [4,6]. At higher temperatures the PO 4 or HPO 3 groups and the betaine molecules are disor dered. They both order in the antiferrodistortive phase, but the hydrogen atoms linking PO 4 or HPO 3 groups remain disordered [5].…”

Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 83%

“…The betaine molecules are arranged almost perpendicular to this chain along the a direction and are linked by one (BPI) or two (BP) hydrogen bonds to the inorganic group [4]. The anti ferrodistorsive phase transition is observed in BPI at 355 K and in BP at 365 K (the symmetry change is P2 1 /m → P2 1 /c) [4,6]. At higher temperatures the PO 4 or HPO 3 groups and the betaine molecules are disor dered.…”

Section: Introductionmentioning

confidence: 83%

“…The structure of both compounds is very similar [4][5][6]. The PO 4 or, respectively, PO 3 groups are connected by hydrogen bonds and form quasionedimensional chains along the monoclinic b axis [4]. The betaine molecules are arranged almost perpendicular to this chain along the a direction and are linked by one (BPI) or two (BP) hydrogen bonds to the inorganic group [4].…”

Section: Introductionmentioning

confidence: 84%

“…The PO 4 or, respectively, PO 3 groups are connected by hydrogen bonds and form quasionedimensional chains along the monoclinic b axis [4]. The betaine molecules are arranged almost perpendicular to this chain along the a direction and are linked by one (BPI) or two (BP) hydrogen bonds to the inorganic group [4]. The anti ferrodistorsive phase transition is observed in BPI at 355 K and in BP at 365 K (the symmetry change is P2 1 /m → P2 1 /c) [4,6].…”

Section: Introductionmentioning

confidence: 99%

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Crossover between ferroelectric order and dipolar glass disorder in betaine phosphate_0.06betaine phosphite_0.94mixed crystals

Banys¹,

Macutkevič²,

Klimm³

et al. 2015

Lith. J. Phys.

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The dielectric properties of mixed betaine phosphate 0.06 betaine phosphite 0.94 (BP 0.06 BPI 0.94 ) ferroelectric crystals were investigated in a wide frequency range from 20 Hz to 3 GHz. Although the dielectric anomaly is clearly observed close to the ferroelectric phase transition temperature T c = 121 K, the dielectric dispersion is very broad around and below this temperature. Temperature dependences of the dielectric strength, the mean relaxation frequency and the spontaneous polarization cannot be described together according to the Landau theory for ferroelectric phase transition with a single order parameter or according to the quasione-dimensional Ising model. The polarization shows a pronounced distribution in the ferroelectric phase and only a partial ordering of hydrogen atoms occurs down to the lowest temperatures. The unordered hydrogen atoms form a glassy phase and its formation is observed in dielectric spectra at very low temperatures. The proton freezing temperature was estimated.

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Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Crossover between ferroelectric order and dipolar glass disorder in betaine phosphate_0.06betaine phosphite_0.94mixed crystals

Banys¹,

Macutkevič²,

Klimm³

et al. 2015

Lith. J. Phys.

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Crystal Structure of the Ferroelectric Phase of (BP)0.08(BPI)0.92

Andrade

Santos

Silvestre

et al. 1999

phys. stat. sol. (b)

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We have determined the structure of (BP)0.08(BPI)0.92 both in the ferrodistortive (at ≈︂294 K) and in the ferroelectric (at ≈︂146 K) phases, by single crystal X‐ray diffraction measurements. A detailed comparison between the structures revealed small but significant structural distortions, consisting almost exclusively of rotations which evidence the order–disorder nature of protons in the bonds linking neighbouring molecules in the chains and confirm the increase of the hybridization of the orbitals of the O–H valence electrons in these bonds upon cooling. These observations suggest that the proton ordering may be, if not the only contribution to the macroscopic polarization, at least the mechanism triggering the para–ferroelectric phase transition in (BP)0.08(BPI)0.92.

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Ultrasonic Anomalies in Deuterated Betaine Phosphite near the Ferroelectric Phase Transition

Samulionis

Banys

Völkel

et al. 1998

phys. stat. sol. (a)

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Paraelectric and ferroelectric phases of betaine phosphite: Structural, thermodynamic, and dielectric properties

Cited by 77 publications

References 28 publications

Crossover between ferroelectric order and dipolar glass disorder in betaine phosphate_0.06betaine phosphite_0.94mixed crystals

Crossover between ferroelectric order and dipolar glass disorder in betaine phosphate_0.06betaine phosphite_0.94mixed crystals

Crystal Structure of the Ferroelectric Phase of (BP)0.08(BPI)0.92

Ultrasonic Anomalies in Deuterated Betaine Phosphite near the Ferroelectric Phase Transition

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Paraelectric and ferroelectric phases of betaine phosphite: Structural, thermodynamic, and dielectric properties

Cited by 77 publications

References 28 publications

Crossover between ferroelectric order and dipolar glass disorder in betaine phosphate0.06betaine phosphite0.94mixed crystals

Crossover between ferroelectric order and dipolar glass disorder in betaine phosphate0.06betaine phosphite0.94mixed crystals

Crystal Structure of the Ferroelectric Phase of (BP)0.08(BPI)0.92

Ultrasonic Anomalies in Deuterated Betaine Phosphite near the Ferroelectric Phase Transition

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Product

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Crossover between ferroelectric order and dipolar glass disorder in betaine phosphate_0.06betaine phosphite_0.94mixed crystals

Crossover between ferroelectric order and dipolar glass disorder in betaine phosphate_0.06betaine phosphite_0.94mixed crystals