Microwave properties of Ba $\mathsf{_{0.6}}$ K $\mathsf{_{0.4}}$ BiO $\mathsf{_3}$ crystals

Stefano Fricano (), M. Bonura, A. Agliolo Gallitto (), M. Vigni, L. Klinkova and N. Barkovskii

The European Physical Journal B: Condensed Matter and Complex Systems, 2004, vol. 41, issue 3, 313-318

Abstract: We report on field-induced variations of the microwave surface resistance at 9.6 GHz of Ba 0.6 K 0.4 BiO 3 crystals. Energy losses have been investigated as a function of the static magnetic field in the range of temperatures 4.2 K $\div T_c$ . By analyzing the experimental results in the framework of the Coffey and Clem model we determine the temperature dependence of the first-penetration field, upper critical field and depinning frequency. The results show that the pinning energy of this bismuthate superconductor is weaker than those of cuprates. Copyright Springer-Verlag Berlin/Heidelberg 2004

Date: 2004
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DOI: 10.1140/epjb/e2004-00323-6

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