Effect of electric fields on modulated structure of deuterated betaine calcium chloride dihydrate

M. R. Chaves; A. Almeida; J. C. Tolédano; J. Schneck; J. M. Kiat; W. Schwarz; J. L. Ribeiro; A. Klöpperpieper; J. Albers; H. E. Müser

doi:10.1103/PhysRevB.48.13318

Effect of electric fields on modulated structure of deuterated betaine calcium chloride dihydrate

M. R. Chaves, A. Almeida, J. C. Tolédano, J. Schneck, J. M. Kiat, W. Schwarz, J. L. Ribeiro, A. Klöpperpieper, J. Albers, and H. E. Müser

Phys. Rev. B 48, 13318 – Published 1 November 1993

Abstract

The modulation wave vector q=δ(T) $c^{*}$ of deuterated betaine calcium chloride dihydrate (D-BCCD) was measured as a function of the temperature for certain dc electric fields, using elastic neutron scattering. The results obtained are compared with the behavior of the dielectric constant of electric-field-biased D-BCCD. The temperature range of stability of the polar phases with δ=2/7, 4) / 15 ,2/9, 2) / 11 increases with a dc electric field along b. The results are discussed qualitatively, in terms of Landau theory.

Received 2 August 1993

DOI:https://doi.org/10.1103/PhysRevB.48.13318

Authors & Affiliations

M. R. Chaves and A. Almeida

Centro de Física da Universidade do Porto (Instituto Nacional de Investigação Científica), Faculdade de Ciências, Universidade do Porto, 4000 Porto, Portugal

J. C. Tolédano and J. Schneck

Centre National d’Études des Télécommunications, Bagneux 92220, France

J. M. Kiat

Laboratoire Leon Brillouin (Commissariat à l’Energie Atomique et du Centre National de la Recherche Scientifique) Centre d’Etudes Nucléaires de Saclay, 91191 Gif-sur-Yvette Cedex, France
Laboratoire de Chemie Physique du Solide (Centre National de la Recherche Scientifique), École Centrale, Grand Voie des Vignes, 92295 Chatenay, Malabry, France

W. Schwarz

Laboratoire Leon Brillouin, Centre d’Etudes Nucleaires de Saclay, 91191 Gif-sur-Yvette Cedex, France
Institut für Experimental Physik, Universität of Vienna, Vienna, Austria

J. L. Ribeiro

Departamento de Física, Escola de Ciências, Universidade do Minho, 4700 Braga Centro de Física da Universidade do Porto (Instituto Nacional de Investigação Cíentífica), Faculdade de Ciências, Universidade do Porto, 4000 Porto, Portugal

A. Klöpperpieper, J. Albers, and H. E. Müser

Fachbereich Physik, Universität des Saarlandes, 6600 Saarbrücken, Germany

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Vol. 48, Iss. 18 — 1 November 1993

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