Pretransitional dynamics of the structural phase transition in anthracene-TCNB: A comparison of Raman-scattering and inelastic-neutron-scattering experiments

1996 ◽  
Vol 54 (21) ◽  
pp. 15002-15015 ◽  
Author(s):  
P. Bourges ◽  
M. H. Lemée-Cailleau ◽  
P. Launois ◽  
C. Ecolivet ◽  
H. Cailleau ◽  
...  
Keyword(s):  
Phase Transition ◽  
Raman Scattering ◽  
Neutron Scattering ◽  
Structural Phase Transition ◽  
Inelastic Neutron Scattering ◽  
Structural Phase ◽  
Inelastic Neutron

scholarly journals Pressure-induced structural phase transition in CaCrO4: Evidence from Raman scattering studies

2005 ◽  
Vol 87 (18) ◽  
pp. 181901 ◽  
Author(s):  
Y. W. Long ◽  
W. W. Zhang ◽  
L. X. Yang ◽  
Y. Yu ◽  
R. C. Yu ◽  
...  
Keyword(s):  
Phase Transition ◽  
Raman Scattering ◽  
Structural Phase Transition ◽  
Structural Phase

Neutron-Scattering Study of the Structural Phase Transition in the One-Dimensional ConductorK2Pt(CN)4Br0.3·3D2O

1974 ◽  
Vol 32 (15) ◽  
pp. 836-839 ◽  
Author(s):  
B. Renker ◽  
L. Pintschovius ◽  
W. Gläser ◽  
H. Rietschel ◽  
R. Comès ◽  
...  
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
One Dimensional ◽  
Scattering Study ◽  
Neutron Scattering Study ◽  
The One

Phase Transitions and Water Dynamics of [Mn(H2O)6](ClO4 )2 Studied by Differential Scanning Calorimetry and Neutron Scattering Methods

2000 ◽  
Vol 55 (9-10) ◽  
pp. 759-764 ◽  
Author(s):  
E. Mikuli ◽  
A. Migdał-Mikuli ◽  
I. Natkaniec ◽  
J. Mayer
Keyword(s):  
Phase Transition ◽  
Low Temperature ◽  
Neutron Scattering ◽  
Structural Phase Transition ◽  
Room Temperature ◽  
Structural Phase ◽  
Water Dynamics ◽  
Water Molecules ◽  
Temperature Phase ◽  
Solid Phases

Abstract DSC measurements performed at 95 -290 K have shown that [Mn(H 2 O) 6 ](CIO 4) 2 possesses, besides a high-temperature phase, existing above 323 K, four low-temperature solid phases. The inelastic incoherent neutron scattering (IINS) spectra and neutron powder diffraction (NPD) pat-terns registered at 20 -290 K have supported the DSC results and provided evidence that the investigated substance possesses even more than five solid phases. The IINS spectra have shown that in the room-temperature phase, water molecules perform fast stochastic reorientation at the picosecond scale. The orientational disorder characteristic for the room-temperature phase can be easily overcooled and frozen. Even by relatively slow cooling at ca. 40 K/hour a metastable, orientational (protonic) glass phase is formed below ca. 160 K. Below ca. 100 K, a structural phase transition was observed by the NPD, however the IINS spectra indicate existence of the pure ordered low-temperature phase only after annealing the sample for a few hours at 100 K. On heating, a structural phase transition takes place at ca. 120 K, and at ca. 225 K water molecules begin fast reorientation.

Pressure-induced structural phase transition of CdS microcrystals studied by raman scattering

1995 ◽  
Vol 56 (3-4) ◽  
pp. 491-494 ◽  
Author(s):  
Toshihiro Arai ◽  
Toshiharu Makino ◽  
Masaaki Arai ◽  
Kiyoto Matsuishi ◽  
Seinosuke Onari
Keyword(s):  
Phase Transition ◽  
Raman Scattering ◽  
Structural Phase Transition ◽  
Structural Phase

Pressure-induced structural phase transition in Na0.5Bi4.5Ti4O15 by Raman scattering

1996 ◽  
Vol 218 (1-2) ◽  
pp. 94-98 ◽  
Author(s):  
Jianjun Liu ◽  
Chunxiao Gao ◽  
Guangtian Zou ◽  
Yanrong Jin
Keyword(s):  
Phase Transition ◽  
Raman Scattering ◽  
Structural Phase Transition ◽  
Structural Phase

High-pressure Raman scattering and inelastic neutron scattering studies of triaminotrinitrobenzene

1991 ◽  
Vol 95 (24) ◽  
pp. 10103-10109 ◽  
Author(s):  
Sushil K. Satija ◽  
Basil Swanson ◽  
Juergen Eckert ◽  
J. A. Goldstone
Keyword(s):  
High Pressure ◽  
Raman Scattering ◽  
Neutron Scattering ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron

NH3 reorientation in phases I, II, and III of Ni(NH3)6(NO3)2

1988 ◽  
Vol 66 (4) ◽  
pp. 692-697 ◽  
Author(s):  
Gordon J. Kearley ◽  
Herma Blank
Keyword(s):  
Phase Transition ◽  
Neutron Scattering ◽  
Strong Interaction ◽  
Rotational Motion ◽  
Inelastic Neutron Scattering ◽  
Inelastic Neutron ◽  
Phase Iii ◽  
Single Type ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering

The inelastic neutron scattering (INS) spectra of rotational tunnelling and librations of NH3 ligands in phase III of Ni(NH3)6(NO3)2 are not consistent with a rotational hindrance potential containing only cos [Formula: see text] terms owing to strong interaction between neighboring cations. This type of interaction, and motion of the whole cation, also influences the classical reorientational motions involving displacement of the H atoms, where the overall radius of rotation is consistently greater than the 0.9 Å expected for isolated NH3 rotors. Quasielastic neutron scattering (QNS) suggests that in phase III there are two sublattices of cations, one of which becomes completely disordered (with respect to the NH3 rotors) at the III–II phase transition. Disorder of the second sublattice marks the II–I transformation where only a single type of rotational motion is found.

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