Superconductivity in Ta-doped Zr5Ge3 System

POSTER

Abstract

Inspired by the discovery of first superconductor Zr5Sb3 in the large hexagonal Mn5Si3-type compounds, we have carried out systematical doping studies in the Ta-doped Zr5-xTaxGe3 (0 $\le $ x $\le $ 5) system. X-ray diffraction analysis has shown a clear phase transition from hexagonal Mn5Si3-type structure to tetragonal W5Si3-type structure occurring when x\textgreater 3. Superconductivity up to 4.5K is observed, on the other hand, when Ta doping level is 0.5$\le $x$\le $2. The superconductivity is further demonstrated from both magnetic and electrical resistivity measurements with type-II superconductors and upper critical field \textasciitilde 5000 Oe. The detailed synthesis and characterizations will be presented and discussed.

Authors

  • Varun Anand

    The University of Texas at Dallas, Richardson, Texas

  • Sheng Li

    University of Texas at Dallas, Department of Physics, University of Texas at Dallas, The University of Texas at Dallas, Richardson, Texas

  • Xiaoyuan Liu

    University of Texas at Dallas, The University of Texas at Dallas, Richardson, Texas

  • Bing Lv

    University of Texas at Dallas, Department of Physics, University of Texas at Dallas, The University of Texas at Dallas, Richardson, Texas