E V Sampathkumaran
Articles written in Pramana – Journal of Physics
Volume 28 Issue 6 June 1987 pp 1- Rapid Communications
The results of x-ray diffraction, electrical resistance, DC and AC magnetization studies on two specimens of compositions Y2.1Ba3.9Cu6O14−δ and Y1.8Ba4.2Cu6O14−δ are presented. Our studies confirm that La3Ba3Cu6O14 type orthorhombic phase is responsible for superconductivity in the 90 K range. The heat treatment that yields high quality samples with sharp transition in electrical resistance as well as in AC magnetic susceptibility measurements is described. Magnetic response just below
Volume 42 Issue 3 March 1994 pp 251-260
The description of a calorimeter for measurement of heat-capacity in the temperature range, 2–150 K, by semi-adiabatic heat-pulse method is presented. The data collection is computerized and various parameters monitored through the software ensure high quality of the data. The performance of the calorimeter was verified with the well-known standard materials. Results on the alloys, PrCu2Si2 and GdCu2Si2, are also presented.
Volume 93 | Issue 6
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