Journal ArticleDOI
Experimental Studies of Phase Transitions in Betaine Phosphate
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TLDR
In this paper, the phase sequence of betaine phosphate was interpreted with the Landau-type thermodynamic potential, and the experimental results confirmed two low temperature transitions in the Raman spectra.Abstract:
Successive phase transitions in betaine phosphate were studied by measuring the temperature and pressure dependence of dielectric constants, and by observing the temperature dependence of the Raman spectra. The experimental results confirmed two low temperature transitions. The phase sequence is phenomenologically interpreted with the Landau-type thermodynamic potential.read more
Citations
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Journal ArticleDOI
Paraelectric and ferroelectric phases of betaine phosphite: structural, thermodynamic, and dielectric properties
I. Fehst,M. Paasch,S. L. Hutton,M. Braune,Roland Böhmer,Alois Loidl,M. Dörffel,Th. Narz,S. Haussühl,Garry J. McIntyre +9 more
TL;DR: In this paper, the paraelectric and ferroelectric phases of betaine phosphite [BPI: (CH3)3 NCH2COO H3PO3] single crystals have been studied.
Paraelectric and ferroelectric phases of betaine phosphite
Roland Böhmer,I. Fehst,M. Paasch,S. L. Hutton,M. Braune,Alois Loidl,M. Dörffel,T. Narz,S. Haussühl,Garry J. McIntyre +9 more
Journal ArticleDOI
Pressure-temperature phase diagrams of betaine-arsenate, -phosphate, and -phosphite
TL;DR: In this article, the dielectric constant e(p, T) in the temperature interval 40 K ≤ T ≤ 250 K was measured and linear shifts of the transition temperatures Tc on applying hydrostatic pressure p in the range p ≤ 450 MPa.
Journal ArticleDOI
Raman and infrared study of the quasi-one-dimensional betaine arsenate-phosphate mixed-crystal system
TL;DR: In this article, the authors performed Raman and infrared investigation of samples across the whole (x, T) phase diagram, at various hydrostatic pressures, in order to shed light on the structural origin of the different processes.
Journal ArticleDOI
Competing interactions and phase transitions in betaine arsenate-betaine phosphate (BAxBP1-x)
TL;DR: In this paper, mixed crystals of ferroelectric (f) betaine arsenate (BA) and antiferroelectric(af) antiferrous betaine phosphate (BP), BAxBP1-x, x=0.24, 0.39 by observing the anomalies in the real part of the dielectric function (ϵ) and the dissipation factor (tan δ) at various temperatures (23 < T < 300 K) and hydrostatic pressures (p < 300 MPa) at frequencies F = 0.
References
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Journal ArticleDOI
Structural and antiferroelectric phase transitions in betaine phosphate, (CH3)3NCH2COO · H3PO4
W. Schildkamp,J. Spilker +1 more
Journal ArticleDOI
Antiferroelectricity in Betaine Phosphate
TL;DR: In this paper, single crystals of betaine phosphate, (CH3)3NCH2COO · H3PO4, are investigated by dielectric, optic, caloric, and X-ray methods.
Journal ArticleDOI
Investigations on the dynamics of ferro- and antiferroelectric betaine compounds
TL;DR: In this paper, the dielectric permittivity around the ferroelectric transition of betaine arsenate and around the antiferroelectric one of deuterated betaine arsenic was analyzed.
Journal ArticleDOI
Elastic Anomalies in Antiferroelectric Betaine Phosphate
TL;DR: In this article, temperature dependences of elastic compliance coefficients s 11, s 22 and s 33 are measured on betatine phosphate and Phenomenological theories are proposed for the structural phase transition and antiferroelectric phase transition.
Journal ArticleDOI
Dynamical studies of highly deuterated betaine phosphate near the antiferroelectric phase transition
TL;DR: In this article, the dielectric response and the Raman spectra of single crystals of deuterated betaine phosphate were studied around the antiferroelectric phase transition.
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Antiferroelectricity in Betaine Phosphate
Structural and antiferroelectric phase transitions in betaine phosphate, (CH3)3NCH2COO · H3PO4
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