We study muon-spin rotation (μSR) spectra in the mixed phase of highly anisotropic layered superconductors, specifically Bi2+xSr2−xCaCu2O8+δ (BSCCO), by modeling the fluid and solid phases of pancake vortices using liquid-state and density functional methods. The role of thermal fluctuations in causing motional narrowing of μSR lineshapes is quantified in terms of a first-principles theory of t...

The decomposition of almost fully reacted (Bi,Pb)2Sr2Ca2Cu3Ox (BSCCO-2223) tapes caused by heating in 1 atm of pure O2 at 825 C has been studied. It was found that partially decomposing 2223 tapes to a mixture of Bi2Sr2Ca1Cu2Oy, (Ca,Sr)2PbO4, and other secondary phases reduced the critical current density (77 K, 0 T) from ~20 kA/cm to nearly zero. Reheating the tapes in 7.5% O2 restored the 222...

The local density of states power spectrum of optimally doped Bi2Sr2CaCu2O8+x BSCCO has been interpreted in terms of quasiparticle interference peaks corresponding to an “octet” of scattering wave vectors connecting k points where the density of states is maximal. Until now, theoretical treatments have not been able to reproduce the experimentally observed weights and widths of these octet peak...

We describe two experimental approaches to circumvent the problem of self-heating in IV measurements on small mesa samples of 2212-BSCCO. Simultaneous dc and temperature measurements have been performed, allowing corrections for heating to be made. Short pulse measurements have also been made, where the IV characteristics and the mesa temperature can be measured on a µs timescale enabling intri...

Intrinsic c-axis tunnelling in the superconducting state has been measured in zero and finite fields in small mesa structures fabricated on the surface of 2212-BSCCO single crystals. The temperature dependence of the zero-field critical current and quasi-particle conductance is related to microscopic d-wave models in the presence of impurity scattering. The strong field dependence of the c-axis...

Abstract Superconductor Bi-Sr-Ca-Cu-O (BSCCO) thin films were fabricated on silver by electrophoretic deposition (EPD) method. By investigating the effects of solvents and I 2 additives properties suspension prepared BSCCO powder, particle charging mechanism is analyzed. Studying effect different structure isopropanol best dispersion solvent. Through optimization concentration, results show tha...

In this research, the influence of Bi nanoparticles addition on the high temperature superconductor BSCCO-2223 was studied. For this purpose, the samples were synthesized by the conventional sol-gel method. Then, the Bi nanoparticles with x= 0.00, 0.03, 0.06, 0.12wt% was added to BSCCO-2223. The structural characterization of all the samples was done by X-ray diffraction pattern (XRD). Also, th...