-
- Home
- Journals
- Bulletin of Materials Science
-
P Pramanic
Articles written in Bulletin of Materials Science
-
-
Volume 14 Issue 3 June 1991 pp 713-718 International Conference On Superconductivity—II
Effect of laser irradiation on the superconducting properties of high-
T c SmBa2Cu3Ox B K Roul A K Pradhan V V Rao P Bhattacharya P Pramanic V R Kalvey D N Bose K L Chopra
Studies of the effect of high power laser (Q-switched Ruby laser, 694 nm, 30 ns) irradiation on the critical current density (
J c ) and magnetic hysteresis at 77K and temperature variation of microwave induced d.c. voltage on SmBa2Cu3Ox ceramic samples have been performed. Irradiation did not substantially changeT c but caused a strong increase inJ c and magnetic hysteresis at 77K. The microwave-induced d.c. voltage at 77K showed appreciable decrease after irradiation. SEM studies showed grain growth due to sintering which improves the interconnectivity among the superconducting grains. These are attributed to physical densification and consequent reduction in the number of weak links. The increase of magnetic hysteresis after laser irradiation is presumably connected with the creation of defects which act as pinning centres. Thermal modelling suggests that on irradiation the surface melts up to a depth of 1µ and laser-induced evaporation occurs at energy density of 2·5 J/cm2.
-
-
Bulletin of Materials Science
Volume 46, 2023
All articles
Continuous Article Publishing mode
-
Bulletin of Materials Science | News
-
Dr Shanti Swarup Bhatnagar for Science and Technology
Posted on October 12, 2020Prof. Subi Jacob George — Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur, Bengaluru
Chemical Sciences 2020Prof. Surajit Dhara — School of Physics, University of Hyderabad, Hyderabad
Physical Sciences 2020 -
Editorial Note on Continuous Article Publication
Posted on July 25, 2019Click here for Editorial Note on CAP Mode
-