The mechanism of fast Ni diffusion in the high-temperature phase of studied with quasielastic neutron scattering

1996 ◽  
Vol 8 (26) ◽  
pp. 4727-4738 ◽  
Author(s):  
G Vogl ◽  
M Kaisermayr ◽  
O G Randl
Keyword(s):  
High Temperature ◽  
Neutron Scattering ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering

Interplay between Anion Rotation and Cation Transport in the Plastic High-Temperature Phase of Sodium Ortho-Phosphate

1998 ◽  
Vol 527 ◽  
Author(s):  
K. Funke ◽  
D. Wilmer ◽  
R. D. Banhatti ◽  
M. Witschas ◽  
R. E. Lechner ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Phase ◽  
Dynamics Simulation ◽  
Temperature Phase ◽  
Present Contribution ◽  
Plastic Crystals ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering ◽  
Ion Conducting ◽  
A Chain

ABSTRACTThe high-temperature phase of sodium ortho-phosphate, α-Na3PO4, belongs to the class of ion conducting plastic crystals, i.e., it is characterized by a dynamic rotational disorder of its poly-atomic anions and, at the same time, by a considerable translational mobility of its cations. During the past decade, the possibility, nature, and importance of a dynamic interplay between the two kinds of motion have been a subject of continued controversy. Proponents of a strong interplay coined the expression “paddle-wheel mechanism”. In our present contribution we report, for the first time, on the results of dynamic experiments probing the elementary steps of anionic and cationic motion individually. The techniques utilized in this study are coherent quasielastic neutron scattering and high-frequency conductivity spectroscopy, respectively. The data are complemented by an ab-initio molecular-dynamics simulation. Our results provide a view of the movement of anions and cations and of correlations between them. Strong dynamic coupling is detected between the octahedrally coordinated sodium ions and nearby oxygen ions. For translational sodium-ion transport, a chain mechanism appears to be operative.

scholarly journals Diffuse neutron scattering in high-temperature phase of relaxor PbMg1/3Nb2/3O3

2010 ◽  
Vol 66 (a1) ◽  
pp. s214-s215
Author(s):  
Roman Burkovsky ◽  
Sergey Vakhrushev ◽  
Kazuma Hirota ◽  
Masato Matsuura
Keyword(s):  
High Temperature ◽  
Neutron Scattering ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Diffuse Neutron

Refinement of the crystal structure of the high-temperature phase G 0 in (NH4)2WO2F4 (powder, X-ray, and neutron scattering)

2013 ◽  
Vol 58 (1) ◽  
pp. 129-134 ◽  
Author(s):  
D. M. Novak ◽  
L. S. Smirnov ◽  
A. I. Kolesnikov ◽  
V. I. Voronin ◽  
I. F. Berger ◽  
...  
Keyword(s):  
Crystal Structure ◽  
High Temperature ◽  
Neutron Scattering ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
X Ray

Hydrogen dynamics in the low temperature phase of LiBH4 probed by quasielastic neutron scattering

2013 ◽  
Vol 427 ◽  
pp. 18-21 ◽  
Author(s):  
Arndt Remhof ◽  
Andreas Züttel ◽  
Timmy (A.J.) Ramirez-Cuesta ◽  
Victoria García-Sakai ◽  
Bernhard Frick
Keyword(s):  
Low Temperature ◽  
Neutron Scattering ◽  
Temperature Phase ◽  
Quasielastic Neutron ◽  
Quasielastic Neutron Scattering ◽  
Low Temperature Phase
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