P Ch Sahu
Articles written in Pramana – Journal of Physics
Volume 24 Issue 6 June 1985 pp 825-835 Experimental Techniques
A high pressure-high temperature cell which permits
Volume 33 Issue 6 December 1989 pp 667-672 Condensed Matter Physics
This paper reports the phase transformation behaviour of tetracyanoethylene (TCNE) under pressure as revealed by AC electrical resistivity, its time evolution and X-ray diffraction studies. An irreversible transformation from monoclinic to cubic phase occurs at 2.1±0.1 GPa and is indicated by a sharp resistivity drop at this pressure. The time evolution of resistivity studies indicate that this transformation occurs via an intermediate phase having resistivity higher than either of the two crystalline phases. Finally, the kinetics of phase transformations obtained by time evolution of resistivity is compared with the X-ray studies on the pressure quenched TCNE.
Volume 40 Issue 5 May 1993 pp 367-376
We report the diamond anvil cell (DAC) high pressure powder X-ray diffraction studies on amorphous selenium (a-Se) under truly hydrostatic pressure condition up to 20 GPa. Amorphous selenium exhibits a sharp and irreversible transition to a hexagonal structure at 10.6 ± 0.1 GPa. It is also known that metallization occurs in a-Se around this pressure. Some plausible arguments are provided to suggest that the amorphous to crystalline transition may be driven by metallization.
Volume 54 Issue 5 May 2000 pp 685-708 Review Articles
The rare-earth and actinide based compounds are endowed with several exotic physical and chemical properties due to the presence of
Volume 94, 2020
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