B K Basu
Articles written in Pramana – Journal of Physics
Volume 11 Issue 2 August 1978 pp 119-134 Solids
Ferroelectric phase transition in RbH2PO4 has been investigated using propagation of longitudinal acoustic waves along the polar axis near the transition temperature. The velocity of this mode is continuous across the transition temperature. Velocity data in the ferroelectric phase are analyzed in terms of coupled soft modeacoustic mode model of Pytte to obtain the temperature dependence of the soft mode frequency. The attenuation data in the ferroelectric phase show power law dependence. It follows scaling behaviour of the type predicted by Kawasaki from the mode-mode coupling theory and the dynamical scaling.
Volume 22 Issue 5 May 1984 pp 439-445 Solid State Physics
Two aspects of ultrasonic attenuation in superconductors are examined: (i) electron drag on dislocations and (ii) anomalous results in energy gap measurements. None of these features is physically understandable at present.
Volume 30 Issue 4 April 1988 pp 1- Rapid Communications
We report here the results of our heat capacity
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