Magneto-microwave absorption study of flux depinning in Hg0.7Pb0.3Ba2Ca2Cu3O8 superconductor

Frank J. Owens, A. G. Rinzler, Z. Iqbal

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6 Scopus citations

Abstract

The microwave absorption in the superconducting state of single-phase Hg0.7Pb0.3Ba2Ca2Cu3O8+x havi ng a Tc of 133 K is shown to depend linearly on the square root of the DC magnetic field strength with a change of slope occuring at a DC magnetic field B* which corresponds to an onset of an irreversibility in the field dependence of the microwave absorption. A measurement of the temperature dependence of B* enables a determination of an H-T irreversibility line at 9.2 GHz. A comparison of the magnetic-field-induced dissipation with that the Y-Ba-Cu-O indicates that the Hg-Pb-Ba-Ca-Cu-O material has a larger pinning barrier to flux detrapping at 77 K.

Original languageEnglish (US)
Pages (from-to)30-34
Number of pages5
JournalPhysica C: Superconductivity and its applications
Volume233
Issue number1-2
DOIs
StatePublished - Nov 10 1994

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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