Abstract.
We report on field-induced variations of the microwave surface resistance at 9.6 GHz of Ba0.6K0.4BiO3 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.
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Received: 29 July 2004, Published online: 21 October 2004
PACS:
74.25.Ha Magnetic properties - 74.25.Nf Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.) - 74.25.Op Mixed states, critical fields, and surface sheaths
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Fricano, S., Bonura, M., Agliolo Gallitto, A. et al. Microwave properties of Ba \(\mathsf{_{0.6}}\)K \(\mathsf{_{0.4}}\)BiO\(\mathsf{_3}\) crystals. Eur. Phys. J. B 41, 313–318 (2004). https://doi.org/10.1140/epjb/e2004-00323-6
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DOI: https://doi.org/10.1140/epjb/e2004-00323-6