Physical Sciences and Mathematics Commons^™

Absorption At Radio Frequencies In Superconducting Y1Ba2Cu3OY, Stephen Ducharme, R. Durny, J. Hautala, D.J. Zheng, P.C. Taylor, O.G. Symko, S. Kulkarni

Stephen Ducharme Publications

The large magnetic-field-dependent ac absorption in superconducting Y₁Ba₂Cu₃O_y ceramics and powders decreases slowly with increasing frequency in the range 2–16 MHz. The magnetic-field-dependent ac absorption is observed below T_c in superconducting Y₁Ba₂Cu₃O_y ceramics, powders and twinned crystals and in (La,Sr)₂ CuO₂ and BaPb_0.75 Bi_0.25 CuO₃ powders and appears to contain distinct contributions from trapped flux and/or intragrain tunnel junctions and from ordinary superconductor surface impedance. The contribution from trapped flux and/or intragrain tunnel junctions is important in dc magnetic fields …