High-temperature reversible phase transitions and exceptional dielectric anomalies in cobalt(ii) based ionic crystals: [Me3NCH2X]2[CoX4] (X = Cl and Br)

2018 ◽  
Vol 47 (17) ◽  
pp. 6218-6224 ◽  
Author(s):  
Xiu-Ni Hua ◽  
Chao-Ran Huang ◽  
Ji-Xing Gao ◽  
Yang Lu ◽  
Xiao-Gang Chen ◽  
...  
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
High Temperature ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Ionic Crystals ◽  
Temperature Phase Transition ◽  
Reversible Phase

Two isostructural cobalt(ii) based ionic crystals with exceptional dielectric anomalies have been designed as new high-temperature phase transition materials.

HIGH TEMPERATURE PHASE TRANSITIONS WITHOUT INFRARED DIVERGENCES

1994 ◽  
Vol 09 (22) ◽  
pp. 4029-4061 ◽  
Author(s):  
N. TETRADIS ◽  
C. WETTERICH
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
High Temperature ◽  
Order Phase Transition ◽  
High Temperature Phase ◽  
Second Order ◽  
Temperature Phase ◽  
Perturbative Approach ◽  
Temperature Phase Transition ◽  
Infrared Divergences

The most commonly used method for the study of high temperature phase transitions is based on the perturbative evaluation of the temperature-dependent effective potential. This method becomes unreliable in the case of a second order or weakly first order phase transition, due to the appearance of infrared divergences. These divergences can be controlled through the method of the effective average action, which employs renormalization group ideas. We report on the study of the high temperature phase transition for the N-component ϕ4 theory. A detailed quantitative picture of the second order phase transition is presented, including the critical exponents for the behavior in the vicinity of the critical temperature. An independent check of the results is obtained in the large N limit, and contact with the perturbative approach is established through the study of the Schwinger–Dyson equations.

scholarly journals High-temperature phase transition of SrRuO3and SrHfO5: X-ray diffraction and PAC spectroscopy

1996 ◽  
Vol 52 (a1) ◽  
pp. C364-C364
Author(s):  
J. A. Guevara ◽  
S. L. Cuffini ◽  
Y. P. Mascarenhas ◽  
P. de la Presa ◽  
A. Ayala ◽  
...  
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Pac Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Temperature Phase Transition

On the High-Temperature Phase Transition of Gd5Si2Ge2

2005 ◽  
Vol 127 (1) ◽  
pp. 317-324 ◽  
Author(s):  
Yurij Mozharivskyj ◽  
Alexandra O. Pecharsky ◽  
Vitalij K. Pecharsky ◽  
Gordon J. Miller
Keyword(s):  
Phase Transition ◽  
High Temperature ◽  
High Temperature Phase ◽  
Temperature Phase ◽  
Temperature Phase Transition
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