Oxygenation and thermochemical post-growth treatments of top seeded melt-growth (TSMG) YBCO bulk superconductors can significantly influence critical current density. It is shown that, depending on oxygenation conditions and the size of 211 particles, different reductions of intrinsic critical current density values can be obtained due to the reduction in the sample cross-section caused by the ...

Mechanical and functional properties of materials are strongly dependent on the grain boundaries (GBs) which has different atomic structures due to the disorder in periodicity. The grain boundary structures are also influenced by the dopant and vacancies segregated at GBs, providing the functional properties, which cannot be observed in a perfect crystal. In order to control GB structures to im...

the compounds, lanthanium chromite, lanthanium magnetite and lanthanium ferric oxide were prepared through sol-gel methods in powdered form, then calcinated, peletized, and sintered at various temperatures. electrical conductivity of these compounds was measured at various temperatures. the effectiveness of strontium as a dopant on electrical conductivity was also investigated. electrical condu...