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G Ravikumar
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Volume 14 Issue 4 August 1991 pp 899-901 International Conference On Superconductivity—III
Critical current density and magnetization studies on Bi(Pb)SrCaCuO
P K Mishra Shailendra Kumar G Ravikumar P Chaddah B A Dasannacharya Ram Prasad N C Soni
High
T c phase (T c ∼ 110 K) has been obtained in Bi-Sr-Ca-Cu-O system by partially substituting Bi by Pb. Magnetic hysteresis has been measured as a function of temperature. Critical current densities have been measured at 77 K both by transport and a.c. magnetization method in bulk samples for various concentrations of Pb. The results show that substitution of 15 at % Pb for Bi is most preferable for higher critical current density. -
Volume 14 Issue 4 August 1991 pp 939-942 International Conference On Superconductivity—III
Time relaxation of magnetization in type-II superconductors
G Ravikumar P Chaddah K V Bhagwat
We assume that currents induced by isothermal changes of magnetic field decay logarithmically with time. Incorporating this time dependence into the critical state model, we obtain logarithmic relaxation rate of magnetization as a function of field for the case of an infinite cylinder. We compare these calculations with our earlier calculations on infinite slab geometry.
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Bulletin of Materials Science
Volume 45, 2022
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Continuous Article Publishing mode
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Bulletin of Materials Science | News
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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 -
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Posted on July 25, 2019Click here for Editorial Note on CAP Mode
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