Leading-edge Superconductivity Research Developments
This new book focuses on superconductivity which is the ability of certain materials to conduct electrical current with no resistance and extremely low losses. High temperature superconductors, such as La2-xSrxCuOx (Tc=40K) and YBa2Cu3O7-x (Tc=90K), were discovered in 1987 and have been actively studied since. In spite of an intense, worldwide, research effort during this time, a complete understanding of the copper oxide (cuprate) materials is still lacking.Many fundamental questions are unanswered, particularly the mechanism by which high-Tc superconductivity occurs. More broadly, the cuprates are in a class of solids with strong electron-electron interactions. An understanding of such 'strongly correlated' solids is perhaps the major unsolved problem of condensed matter physics with over ten thousand researchers working on this topic. High-Tc superconductors also have significant potential for applications in technologies ranging from electric power generation and transmission to digital electronics.
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anion applied field behavior BFM-SC BFM-SC-PFM TL biased bulk superconductors cations coercive fields conventional superconductors Cooper pairs coupling covalent bonds cuprates curve decreasing dopant doping eigenvalue electron lattice equation exchange bias experimental Figure film flux lines flux pinning free energy function Gdl23 bulk geometry Gibbs free energy hybrid in-plane magnetization increases inhomogeneity ions irradiation Lett longitudinal magnetic component magnetic field magnetization configuration magnetization loops magnetoresistance peaks mechanism MgB2 nanosized non-ohmic normal observed obtained open circles order parameter out-of-plane rotation outer FM layers outer NiFe layers pair amplitudes panel particles percolation threshold phase Phys Physica pinning Pr-doped presented regime resistance respectively Rmax S-layer samples SC interlayer shows SnO2 solid circles solid solution spin stray fields structure superconducting superlattice temperature transition metal transport transverse magnetic upper critical field virgin vortex lattice vortex theory zero zero-field ZrO2