Microwave absorption of the high-Tc superconductor YBa 2Cu3O7

M. Poirier, G. Quirion, Kenneth R Poeppelmeier, J. P. Thiel

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Using a resonant-cavity perturbation technique, the microwave absorption at 16.8 GHz of the high-Tc compound YBa2Cu3O 7 is measured as a function of temperature (4-300 K) and magnetic field (0-7 T). At zero field the microwave loss shows a rapid decrease below 93 K, the onset of the superconducting transition. An important absorption, which is a decreasing function of temperature, is observed in the superconducting state.When a magnetic field is applied, the transition is broadened and shifted toward lower temperatures: an upper-critical field Hc2(T=0)∼ 150 T is obtained via extrapolation of the data. In the superconducting state, the absorption is found to be highly dependent on the magnetic-field intensity. For magnetic fields above 500 Oe, the absorption is a slowly increasing function and it is understood in terms of the temperature behavior of Hc2; for Hc1 and to the anisotropic character of the structure.

Original languageEnglish
Pages (from-to)1646-1650
Number of pages5
JournalJournal of Applied Physics
Volume63
Issue number5
DOIs
Publication statusPublished - 1988

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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