Microwave Properties of Ba(0.6)K(0.4)BiO(3) Crystals

Details Microwave Properties of Ba(0.6)K(0.4)BiO(3) Crystals Microwave Properties of Ba(0.6)K(0.4)BiO(3) Crystals

2004-05-07

arxiv.org/abs/cond-mat/0405140v2

Eur. Phys. J. B 41 (2004) 313-318

Physics

Condensed Matter

Superconductivity

6 pages, 8 embedded figures

Scientific paper

10.1140/epjb/e2004-00323-6

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 - Tc. 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.

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