High-pressure study of ternary mercury chalcogenides: phase transitions, mechanical and electrical properties

2003 ◽  
Vol 36 (16) ◽  
pp. 2021-2026 ◽  
Author(s):  
Vladimir V Shchennikov ◽  
Sergey V Ovsyannikov ◽  
Natalya Yu Frolova
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Electrical Properties ◽  
Mechanical And Electrical Properties ◽  
Mercury Chalcogenides ◽  
High Pressure Study

Characterizing high-pressure compressed C60 whiskers and C60 powder

2003 ◽  
Vol 18 (1) ◽  
pp. 166-172 ◽  
Author(s):  
Kun'ichi Miyazawa ◽  
Minoru Akaishi ◽  
Yusuke Kuwasaki ◽  
Tadatomo Suga
Keyword(s):  
High Pressure ◽  
Electrical Resistivity ◽  
Electrical Properties ◽  
Vickers Hardness ◽  
High Density ◽  
X Ray Diffraction ◽  
X Ray ◽  
Density Of Dislocations ◽  
Mechanical And Electrical Properties

Structural, mechanical, and electrical properties were examined for C60 whiskers, high-pressure sintered C60 whiskers, and C60 powder. A high density of dislocations was observed in the C60 whiskers, and the C60 whiskers with diameters of a few hundred nanometers were found to be flexible. Although both the specimens sintered under the same condition showed similar surface x-ray diffraction profiles with a strong accumulation of [110]tr orientation, the sintered C60 whiskers showed a higher micro-Vickers hardness and an electrical resistivity four orders of magnitude lower than that of the sintered C60 powder.

Pressure induced phase transitions of mercury chalcogenides

1976 ◽  
Vol 54 (1) ◽  
pp. 48-55 ◽  
Author(s):  
B. A. Lombos ◽  
B. Ghicopoulos ◽  
S. Bhattacharya ◽  
B. C. Pant
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Nearest Neighbor ◽  
Theoretical Calculations ◽  
Alkali Halides ◽  
Unit Cell ◽  
Transition Pressure ◽  
Mercury Chalcogenides ◽  
Pressure Phase ◽  
Nearest Neighbor Distances

The nearest neighbor dependence of the pressure induced polymorphic phase transitions of mercury chalcogenides have been analyzed. An ionic and a metallic model were used to compute the lattice energies of both low and high pressure phases and the transition pressures of the HgSexTe1−x alloys. It was found that, contrary to the alkali halides, the transition pressure increases experimentally as well as indicated by theoretical calculations with increasing nearest neighbor distance. This is interpreted with the different behavior of the nearest neighbor distances related to the phase transitions. In the case of the alkali halides, although the dimensions of the unit cell decrease in going from the low to the high pressure phase, the nearest neighbor distances increase. However, in the case of the mercury chalcogenides, the trend concerning the unit cell is the same as in the case of the alkali halides, nevertheless the nearest neighbor distances decrease as a result of the pressure induced phase transition. This might clarify the inverse trend of the transition pressure as a function of the sizes of the anion sublattices, elicited by the nearest neighbor distances, in the case of mercury chalcogenides.

High pressure study of phase transitions inα-FePO4

Pramana ◽  
1997 ◽  
Vol 49 (3) ◽  
pp. 285-291 ◽  
Author(s):  
Chitra Murli ◽  
Surinder M Sharma ◽  
S K Kulshreshtha ◽  
S K Sikka
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
High Pressure Study

High Pressure Study of Phase Transitions in DMPC-Water System

1984 ◽  
Vol 110 (1-4) ◽  
pp. 153-160 ◽  
Author(s):  
R. Shashidhar ◽  
B. P. Gaber ◽  
S. Krishna Prasad ◽  
S. Chandrasekhar
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Water System ◽  
High Pressure Study

Electrical properties and phase transitions of CdS under high pressure and moderate temperature

2011 ◽  
Vol 8 (5) ◽  
pp. 1669-1671
Author(s):  
Chunyuan He ◽  
Bingguo Liu ◽  
Dongmei Zhang ◽  
Chunxiao Gao
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Electrical Properties ◽  
Moderate Temperature

High-pressure-induced phase transitions of mercury chalcogenides

1985 ◽  
Vol 31 (9) ◽  
pp. 5976-5983 ◽  
Author(s):  
Tzuen-Luh Huang ◽  
Arthur L. Ruoff
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Mercury Chalcogenides

scholarly journals High-pressure study of structural phase transitions and superconductivity inLa1.48Nd0.4Sr0.12CuO4

2005 ◽  
Vol 71 (10) ◽  
Author(s):  
M. K. Crawford ◽  
R. L. Harlow ◽  
S. Deemyad ◽  
V. Tissen ◽  
J. S. Schilling ◽  
...  
Keyword(s):  
High Pressure ◽  
Phase Transitions ◽  
Structural Phase ◽  
Structural Phase Transitions ◽  
High Pressure Study
Sign in / Sign up

Export Citation Format

Share Document