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

[1] Aime J. P., 1984, Materials Science, V10, P441
[2] STUDIES OF A POLYMERIZABLE CRYSTAL .1. STRUCTURE OF MONOMER PTS (BIS-P-TOLUENESULFONATE OF 2,4-HEXADIYNE 1,6-DIOL) BY NEUTRON-DIFFRACTION AT 120-K AND 221-K
AIME, JP
LEFEBVRE, J
BERTAULT, M
SCHOTT, M
WILLIAMS, JO
[J]. JOURNAL DE PHYSIQUE, 1982, 43 (02): : 307 - 322
[3] AIME JP, UNPUB
[4] AIME JP, 1983, THESIS U PARIS 7
[5] PHENOMENOLOGICAL MODEL FOR TYPE-II INCOMMENSURATE PHASES HAVING A SOLITON REGIME - THIOUREA CASE
ARAMBURU, I
MADARIAGA, G
PEREZMATO, JM
[J]. PHYSICAL REVIEW B, 1994, 49 (02) : 802 - 814
[6] A RAMAN SIGNATURE OF THE INCOMMENSURATE-COMMENSURATE PHASE-TRANSITION (LOCK-IN) IN A CRYSTALLINE MONOMER DIACETYLENE - PTS
BERTAULT, M
KRAUZMAN, M
LEPOSTOLLEC, M
PICK, RM
SCHOTT, M
[J]. JOURNAL DE PHYSIQUE, 1982, 43 (05): : 755 - 759
[7] STUDIES ON A POLYMERIZABLE CRYSTAL .2. MICROCALORIMETRIC STUDY OF POLYMERIZATION AND POLYMORPHISM OF PARA-TS
BERTAULT, M
SCHOTT, M
BRIENNE, MJ
COLLET, A
[J]. CHEMICAL PHYSICS, 1984, 85 (03) : 481 - 490
[8] BERTAULT M, 1983, THESIS U PARIS 7
[9] BERTAULT M, 1981, J PHYS LETT, V42, P131
[10] NQR IN DIPOLAR AND QUADRUPOLAR GLASSES
BLINC, R
[J]. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 1990, 45 (3-4): : 313 - 322

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