G Ravi Kumar
Articles written in Pramana – Journal of Physics
Volume 30 Issue 2 February 1988 pp 1- Rapid Communications
Anomalous magnetic hysteresis loops and small
A K Grover C Radhakrishnamurty P Chaddah G Ravi Kumar G V Subbarao
We have studied the hysteresis loops of RBa2Cu3O7 (R=Gd, Ho and Y) and detected anomalies in some of them. The observed anomalies support a recent prediction by Ravi Kumar and Chaddah based on an extension of Bean’s model. The anomalies indicate low
Volume 30 Issue 6 June 1988 pp 569-595 Condensed Matter Physics
A K Grover C Radhakrishnamurty P Chaddah G Ravi Kumar G V Subba Rao
We present DC and low frequency AC magnetization measurements on various RBa2Cu3O7 superconductors. We identify features intrinsic to these compounds, and establish the features originating from intergranular links in sintered pellets. The isothermal magnetization curves, and the temperature dependence of magnetization in field-cooled and zero field-cooled states are shown to be consistent with the calculations done following a recent extension of Bean’s model. Low field anomalies predicted within this model are observed, and yield
Volume 31 Issue 4 October 1988 pp 1- Rapid Communications
Magnetic field dependence of critical current density in YBa2Cu3O7
P K Mishra G Ravi Kumar P Chaddah B A Dasannacharya M K Malik
We have measured the transport critical current density
Volume 31 Issue 6 December 1988 pp 505-512 Condensed Matter Physics
Low field anomaly in magnetization curves
We present a calculation of the isothermal magnetization hysteresis curves appropriate to high
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