NEUTRON-SCATTERING STUDY OF PRETRANSITIONAL DYNAMICS IN THE DEUTERATED DIACETYLENE MONOMER 2,4-HEXADIYNYLENE BIS(P-TOLUENESULFONATE)

被引：9

作者：

EVEN, J ^{[1
]}

TOUDIC, B ^{[1
]}

BERTAULT, M ^{[1
]}

CAILLEAU, H ^{[1
]}

MOUSSA, F ^{[1
]}

机构：

[1] CE SACLAY,LAB LEON BRILLOUIN,CNRS,CEA,F-91191 GIF SUR YVETTE,FRANCE

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 10期

关键词：

D O I：

10.1103/PhysRevB.52.7142

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Coherent neutron scattering is used to make a dynamical study of the disubstituted and fully deuterated diacetylene 2,4-hexadiynylene bis(p-toluenesulfonate) (pTS-D) in the monocrystalline monomer state. The aim of this study is to make a comparison with the dynamics of the same monocrystal in the polymer state [Phys. Rev. B 49, 11602 (1994)]. The mechanism leading to the incommensurate phase of pTS-D monomer is also discussed. The experimental study shows an overdamped soft mode above T-i. Its evolutions as a function of temperature and its dispersion are described. A central peak related to the presence of defects is also observed. The soft mode presents roughly the same mean-field behavior for pTS-D monomer and pTS-D polymer. pTS-D mixed monomer-polymer crystals are then probably very good prototypes for the study of the influence of pure random field on a structural phase transition.

引用

页码：7142 / 7150

页数：9

共 47 条

[31] HOCHLI UT, 1990, ADV PHYS, V39, P5
[32] KOBELT D, 1974, ACTA CRYSTALLOGR B, VB 30, P232, DOI 10.1107/S0567740874002524
[33] Levanyuk A. P., 1988, FERROELECTRICITY REL, V6
[34] LEVANYUK AP, 1976, FIZ TVERD TELA, V18, P1122
[35] LEVANYUK AP, 1976, SOV PHYS-SOLID STATE, V18, P1126
[36] LEYRER RJ, 1978, J PHYS CHEM-US, V82, P697
[37] LONGEVILLE S, UNPUB
[38] NEMEC G, 1992, J PHYS CONDENS MATT, V4, P5599
[39] DIELECTRIC-PROPERTIES OF SINGLE-CRYSTALS OF THE SUBSTITUTED DIACETYLENE PTS - EFFECT OF THE SOLID-STATE POLYMERIZATION AND PHASE-TRANSITIONS
NOWAK, R
SWORAKOWSKI, J
KUCHTA, B
BERTAULT, M
SCHOTT, M
JAKUBAS, R
KOLODZIEJ, HA
[J]. CHEMICAL PHYSICS, 1986, 104 (03) : 467 - 476
[40] X-RAY STUDY OF THE INCOMMENSURATE PHASE OF BIS-(PARA-TOLUENE SULFONATE) OF 2,4-HEXADIYNE-1,6 DIOL AS A FUNCTION OF POLYMER CONVERSION
PATILLON, JN
ROBIN, P
ALBOUY, PA
POUGET, JP
COMES, R
[J]. MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1981, 76 (3-4): : 297 - 308

← 1 2 3 4 5 →