AC susceptibility of YBaCuO-Ag composites

✍ Scribed by L. Ghivelder; I.Abrego Castillo; L.M. Pimentel; P. Pureur; O.F. Schilling

• Book ID: 103947342
• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 173 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)91137-1

✦ Synopsis

We have performed measurements of Z' and Z" in YBaCuO-Ag nonrandom composites. Results of Z' vs. temperature show a strong reduction of intra-granular shielding in the superconducting composites. Cooling the samples in large superimposed DC fields, measurements of g' and g" at fixed temperatures as a function of AC field can be fitted with a modified critical state model. This description gives an interpretation for our results in terms of a reduction of the superconducting volume fraction in the composite samples.