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c-axis Transport Properties of $SmFeAsO_{0.85}$ Single Crystals  

Park, Jae-Hyun (Pohang University of Science and Technology)
Doh, Yong-Joo (Pohang University of Science and Technology)
Lee, Hyun-Sook (Pohang University of Science and Technology)
Cho, B.K. (Gwangju Institute of Science and Technology)
Lee, Hu-Jong (Pohang University of Science and Technology)
Publication Information
Progress in Superconductivity / v.11, no.2, 2010 , pp. 118-122 More about this Journal
Abstract
Electrical transport properties were measured on $SmFeAsO_{0.85}$ single crystals along the c-axis for various temperatures and magnetic fields. For the measurements a mesa structure was fabricated on the surface of the single crystals. Samples showed a metallic temperature dependence of resistance and current-voltage curves without hysteretic multiple branch splitting that is usually observed in tunneling Josephson junctions. In addition, in ab-planar magnetic fields, samples did not show the Fraunhofer-type field modulation of the critical current. All these features indicate that the c-axis transport characteristics of $SmFeAsO_{0.85}$ single crystals are explained by the anisotropic bulk superconductivity rather than Josephson tunneling.
Keywords
iron -based superconductor; c-axis transport; anisotropic bulk superconductor;
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