Progress in Superconductivity

한국초전도학회 (The Korean Superconductivity Society)
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$SmFeAsO_{0.85}$ 단결정의 c-축 전도 특성

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

  • 투고 : 2010.03.08
  • 심사 : 2010.03.23
  • 발행 : 2010.04.30
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초록

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.

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참고문헌

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