Weaklink response to the radio frequency (MHz) absorption in GdBCO superconductor

• Published in: Physica. C, Superconductivity Vol. 301; no. 3; pp. 192 - 198
• Main Authors: Patanjali, P.V., Seshu Bai, V.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.06.1998; Elsevier Science
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetoabsortion; Penetration depth; Physics; Properties of type I and type II superconductors; Proximity effects, weak links, tunneling phenomena, and Josephson effects; Proximity effects, weak links, tunneling phenomena, and josephson effects, adreev effect, sn and sns junctions; Response to electromagnetic fields (nuclear magnetic resonance, surface impedance, etc.); Superconductivity; Weaklinks; Magnetoabsortion; Weaklinks; Penetration depth; Temperature dependence; Magnetoabsorption; Inorganic compounds; Transition element compounds; Magnetic field effects; Two fluid model; Sintered materials; Rare earth compounds; Experimental study; Radiofrequency; Resistively shunthed jonction model; Gadolinium oxides; Weak links; Josephson effect; Barium oxides; High-Tc superconductors; Absorption spectra; London theory; Quaternary compounds; Copper oxides
• ISSN: 0921-4534; 1873-2143
• DOI: 10.1016/S0921-4534(98)00099-9

The results of radio frequency absorption studies in GdBCO sintered pellet are reported. The temperature-dependent absorption is found to follow London's two-fluid expression with large effective penetration depth, which has contributions from both grain penetration depth and Josephson penetration depth. Field-induced absorption is found to have contributions from both the resistively shunted Josephson junctions and the decoupled junctions. It is also reported that at radio frequencies field-induced absorption (for fields below 50 mT) arising from the flux flow is absent.