Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1819187 | Physica C: Superconductivity and its Applications | 2010 | 4 Pages |
Abstract
A systematic study of the weak link behaviour for (Cu0.5Tl0.5âxKx)Ba2Ca2Cu3O10âδ (x = 0, 0.25) superconductors samples has been carried out using electrical resistivity and AC-susceptibility techniques. The K-doped (Cu0.5Tl0.5âxKx)Ba2Ca2Cu3O10âδ samples were synthesized by solid-state reaction method. In magnetic susceptibility measurements, the real (Ïâ²) and imaginary (Ïâ³) parts of the magnetic susceptibility of (Cu0.5Tl0.5âxKx)Ba2Ca2Cu3O10âδ (x = 0, 0.25) samples were measured as a function of temperature under various DC-magnetic fields up to 172 Oe. It is observed from these studies that the magnitude of the diamagnetism is substantially enhanced by K-doping. The possible reasons for the enhanced magnitude of diamagnetism have been investigated. It is observed from in-field magnetic measurements that the inter-grain coupling is improved with the K-doping. It is concluded from these studies that potassium atoms appearing at the crystal boundaries enhance inter-grain coupling and pinning mechanism in K-doped (Cu0.5Tl0.25K0.25)Ba2Ca2Cu3O10âδ superconductors.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
Nawazish A. Khan, Safeer Hussain,