Articles written in Pramana – Journal of Physics
Volume 7 Issue 6 December 1976 pp 426-433 Solids
On the behaviour of Er3+ ion in tetragonal crystalline field
Vinod Kumar Narsingh Dass K Chandra
Crystal field parameters for ErGaG and Er3+ YAlG and used to compute the temperature dependence of Schottky specific heat, paramagnetic susceptibility, magnetic anisotropy,
Volume 52 Issue 1 January 1999 pp 75-79
Thermal effect and equation of state in solids
In the present paper, an attempt has been made to include the thermal effect into an isothermal equation of state using the Debye approximation representing volume as a function of pressure. The calculations are done in case of NaCl, CsCl, Mo, and W. The present calculations are in good agreement with the reported results.
Volume 52 Issue 3 March 1999 pp 321-332
An equation of state and non-linear parameter from sound velocity measurements for liquid alkali metals
Piyush Kuchhal Ravindra Kumar Narsingh Dass
In the present paper, an equation of state has been obtained in case of liquid alkali metals like Na, K, Rb and Cs from sound velocity measurements. The theory developed gives very good agreement for both the sound velocity and the volume as a function of pressure at different temperatures in these liquid alkali metals. Further, the variation of non-linear parameter,
Volume 53 Issue 4 October 1999 pp 783-794 Research Articles
Pressure-volume calculation in bcc metals using Born stability criteria
A simple analytical two-body potential φ(
Volume 61 Issue 4 October 2003 pp 753-757 Brief Reports
New isothermal equation of state of solids applied to high pressures
In the present paper, a new two-parameter inverted equation of state (EOS) is developed which is found to be working very well in the high-pressure region. To check its success and validity, this EOS has been applied in a number of solids. The computed volume compression is found to be in very good agreement with the experimental data in the whole range of pressure in all the solids. The minimum and the maximum pressure range used in the present study is 0–320 kbar and 0–3000 kbar, respectively.
Volume 62 Issue 1 January 2004 pp 95-100
Melting temperature of H2, D2, N2 and CH4 under high pressure
Kamal Kapoor Narsingh Dass Rajendra Kumar
The melting temperatures of H2, D2; N2 and CH4 are analysed. The computed results are in very good agreement with the experimental data in each solid. Further, the analysis indicates the presence of the melting maximum in these solids.
Volume 67 Issue 3 September 2006 pp 541-546 Brief Reports
A model for the pressure dependence of diffusion in condensed matter
Kamal Kapoor Rashmi Kumari Narsingh Dass Rajendra Kumar
In the present paper, a model has been used to develop a simple relation to study the pressure dependence of self-diffusion in solids and liquids that has two adjustable parameters. The computation done in each substance is found to be in very good agreement with the experimental data. It is interesting to note that the present relation is also capable of giving the activation volume in solids and liquids. The activation volume computed in the solids is found to be in very good agreement with the data available.
Volume 82 Issue 3 March 2014 pp 549-561 Research Articles
A new temperature-dependent equation of state of solids
Kamal Kapoor Anuj Kumar Narsingh Dass
In the present paper, a temperature-dependent equation of state (EOS) of solids is discussed which is found to be applicable in high-pressure and high-temperature range. Present equation of state has been applied in 18 solids. The calculated data are found in very good agreement with the data available from other sources.
Volume 97, 2023
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