Temperature-pressure phase diagram of an aperiodic host guest compound

B. Toudic; P. Rabiller; L. Bourgeois; M. Huard; C. Ecolivet; G. J. McIntyre; P. Bourges; T. Breczewski; T. Janssen

doi:10.1209/0295-5075/93/16003

All issues

Volume 93 / No 1 (January 2011)

EPL, 93 1 (2011) 16003

Abstract

Issue		EPL Volume 93, Number 1, January 2011


Article Number		16003
Number of page(s)		5
Section		Condensed Matter: Structural, Mechanical and Thermal Properties
DOI		https://doi.org/10.1209/0295-5075/93/16003
Published online		01 February 2011

EPL, 93 (2011) 16003

Temperature-pressure phase diagram of an aperiodic host guest compound

B. Toudic¹^a, P. Rabiller¹, L. Bourgeois¹^,2, M. Huard¹, C. Ecolivet¹, G. J. McIntyre³, P. Bourges⁴, T. Breczewski⁵ and T. Janssen⁶

¹ Institut de Physique de Rennes, UMR UR1-CNRS 6251, Université de Rennes 1 - 35042 Rennes Cedex, France, EU
² Institut des Sciences Moléculaires, UMR 5255 CNRS, Université de Bordeaux - 33405 Talence Cedex, France, EU
³ Institut Laue Langevin - BP 156, 38042 Grenoble Cedex 9, France, EU
⁴ Laboratoire Léon Brillouin, CEA-CNRS, CE Saclay - 91191 Gif-sur-Yvette, France, EU
⁵ Faculdad de Ciencias, Universidad del Pais Vasco - Apdo 644, Bilbao, Spain, EU
⁶ Institute for Theoretical Physics, University of Nijmegen - Nijmegen, The Netherlands, EU

^a bertrand.toudic@univ-rennes1.fr

Received: 8 September 2010
Accepted: 22 December 2010

Abstract

This letter reports on the structural instabilities of an aperiodic composite crystal under pressure. The (P, T) phase diagram up to 0.55 GPa of nonadecane-urea is reported showing various symmetry breakings in crystallographic superspaces, towards three different orthorhombic phases. These structural phase transitions are characterized by a change in the intermodulation and are described by increasing the rank of the crystallographic superspaces.

PACS: 61.50.Ks – Crystallographic aspects of phase transformations; pressure effects / 61.44.Fw – Incommensurate crystals / 61.05.F- – Neutron diffraction and scattering

© EPLA, 2011

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