Speaker
Description
Recently interest in the superconducting community has been piqued by superconducting materials that have a non-centrosym-metric crystal structure in which spin singlet or spin triplet states can develop. In this study we investigate the cubic beta-Mn system (T1-xRx)3Al2C (T,R = Mo, Nb, Ta, V, Ti, Cr, Sc) by systematic replacement of the T element of the compound. Of the end member compounds only T = Nb and Mo are known to superconduct at 1.3K and 9.2K respectively. By doping the Mo system we hope to further elucidate these unique pairing states as well as enhance Tc and/or Bc2. The above-named compositions were investigated via magnetic, resistive, and calorimetric analyses. The superconducting phase diagrams of these compounds were then plotted. Comparisons are made between the effects of doping different transition metal elements as well as possible substitutions on the Al and/or C sites.