Structural phase stability and elastic properties of lanthanum monochalcogenides at high pressure

2006 ◽  
Vol 777 (1-3) ◽  
pp. 5-10 ◽  
Author(s):  
A. Bouhemadou ◽  
R. Khenata ◽  
M. Maamache
Keyword(s):  
High Pressure ◽  
Elastic Properties ◽  
Phase Stability ◽  
Structural Phase

Phase Stability and Elastic Properties of оne Dimensional Long Period Structures of Al3Ti under High Pressure

2016 ◽  
Vol 850 ◽  
pp. 354-361
Author(s):  
Ping Ying Tang ◽  
Guo Hua Huang ◽  
Qing Lian Xie ◽  
Jin Li Huang
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Elastic Properties ◽  
Phase Stability ◽  
Antiphase Boundary ◽  
First Principles Calculations ◽  
One Dimensional ◽  
Long Period ◽  
Phase Transition Pressure ◽  
Order Polynomial

Phase stability and elastic properties of seven one dimensional long period structures (1D-LPSs) of Al3Ti under high pressure have been systematically investigated by first-principles calculations. The enthalpy differences indicate that Al3Ti will undergo a phase transition from 1D-LPSs to L12 structure at high pressure. With increase of antiphase boundary period parameter M’, the enthalpy initially decreases and then increases, and the enthalpy for D023 is the smallest. Oppositely, the phase transition pressure firstly increases and then decreases, and the maximum is for D023. The elastic constants and elastic moduli B, G and E increase monotonically with increase of pressure, and the corresponding second-order polynomial fits are also obtained. Interestingly, the pressure dependence of Poisson’s ratio show similar tendency with that of B/G ratio. Both the B/G ratios and the Cauchy pressures reveal that these 1D-LPSs exhibit brittleness at high pressure.

scholarly journals Pressure induced structural phase transitions—A review

2012 ◽  
Vol 10 (5) ◽  
pp. 1391-1422 ◽  
Author(s):  
Purvee Bhardwaj ◽  
Sadhna Singh
Keyword(s):  
Experimental Data ◽  
High Pressure ◽  
Phase Transitions ◽  
Elastic Properties ◽  
Alkaline Earth ◽  
Structural Phase ◽  
Theoretical Work ◽  
Structural Phase Transitions ◽  
Contemporary Status ◽  
Complete Set

AbstractThe contemporary status of experimental as well as theoretical advances within the special view of structural phase transitions is reviewed. A brief outline of phase transitions and its classification is presented first. High-pressure experimental techniques developed for studying the structural phase transitions and elastic properties are reviewed. The complete set of theoretical and experimental data obtained is for the group II–IV alkaline earth chalcogenides. Here the authors review the currently used calculations and high-pressure behavior of these materials and the theoretical work that has been done on them.

Structural phase transition and elastic properties of ZnSe at high pressure

2004 ◽  
Vol 77 (12) ◽  
pp. 1075-1091 ◽  
Author(s):  
Dinesh Varshney ◽  
N. Kaurav ◽  
P. Sharma ◽  
S. Shah ◽  
R.K. Singh
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Elastic Properties ◽  
Structural Phase Transition ◽  
Structural Phase

High pressure structural phase transition and elastic properties of NdP compound

2015 ◽  
Author(s):  
Y. S. Panwar ◽  
Ashok K. Ahirwar ◽  
Mahendra Aynyas ◽  
S. P. Sanyal
Keyword(s):  
Phase Transition ◽  
High Pressure ◽  
Elastic Properties ◽  
Structural Phase Transition ◽  
Structural Phase
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