Effect of Carbon Nanotubes on Transport Properties of MgB$_{2}$

ORAL

Abstract

Carbon nanotubes (CNT) and magnesium diboride (MgB$_{2})$ are two fascinating materials; with CNT exhibiting unique quantum electrical properties due to its 1-D structure and MgB$_{2}$ being a superconducting with transition temperature (T$_{c})$ at $\sim $40 K. We report preliminary results on the effect of carbon nanotubes on the temperature dependent (300K to 4K) thermoelectric power (TEP) and resistivity of MgB$_{2}$. The normalized resistance (R-R$_{300})$/R$_{300}$ shows very little dependence on the sample composition; however, the absolute resistance increases with increasing CNT concentration. At high CNT composition, the TEP mimic the characteristic TEP of CNT. However at low CNT composition, we see an upturn at about 30K.

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Authors

  • Derek Caplinger

    Department of Physics, The Pennsylvania State University, Altoona College, Altoona, PA 16601, Department of Physics, The Pennsylvania State University, Altoona College, Altoona, PA 16601, USA

  • Danhao Ma

    Department of Physics, The Pennsylvania State University, Altoona College, Altoona, PA 16601, USA

  • Ruwantha Jayasingha

    Department of Physics \& Astronomy, University of Louisville, Louisville, KY 40292, USA

  • Kofi Adu

    Department of Physics, The Pennsylvania State University, Altoona College, Altoona, PA 16601, Department of Physics, The Pennsylvania State University, Altoona College, Altoona, PA 16601, USA

  • Gamini Sumanasekera

    Department of Physics \& Astronomy, University of Louisville, Louisville, KY 40292, USA