P N Dheer
Articles written in Pramana – Journal of Physics
Volume 39 Issue 6 December 1992 pp 655-660
An apparatus for the measurement of thermal expansion of solids at low temperatures
Om Prakash Ashok Rao P N Dheer
A dilatometer, using the three terminal capacitance technique, suitable for measurement of linear thermal expansion of solids in the temperature range 1.3–300 K is described. The dialtometer is designed such that the mounting system for the specimen does not undergo any significant changes in dimensions when the specimen is heated. The apparatus, therefore, yields in principle absolute values of α, the coefficient of linear thermal expansion. The performance of the apparatus has been checked by measurements on copper in the temperature range of 77–300 K. Some preliminary results on the behaviour of α for Y1Ba2Cu3O6.9 compound in the vicinity of superconducting transition temperature,
Volume 41 Issue 5 November 1993 pp 421-428 Research Articles
O M Prakash Ashok Rao O Prakash P N Dheer
Measurements of the coefficient of linear thermal expansion α have been carried out for the orthorhombic and tetragonal phases of RE1Ba2Cu3O
Volume 43 Issue 1 July 1994 pp 11-19
Effect of Fe substitution on the thermal expansion of the high
Ashok Rao Om Prakash S N Das P N Dheer
Thermal expansion measurements have been carried out on Fe substituted superconducting compounds Y1Ba2(Cu1−
Volume 97, 2023
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