Critical currents and micro-structure in YBa2Cu3O7-δ thin films

J. C. Martíneza, B. Stäuble-Pümpin, G. Doornbos, R. Surdeanu, B. Dam, U. Poppe, R. Griessen

Research output: Contribution to journalArticleScientificpeer-review


In an attempt to clarify the origin of the large critical current densities Jc observed in Laser Ablated and Sputtered YBa2Cu3O7-δ (YBCO) thin films, we make a systematic study of the low temperature Jc in samples carefully analysed using STM and AFM. Jc (B) is determined from torque-magnetometry performed in ring-patterned thin films. Epitaxial YBCO films nucleate in e-axis oriented single-crystalline islands with sizes ranging between 200 and 700 nm. We show that Jc can be mainly explained by vortex pinning loealised in the island boundaries.

Original languageEnglish
Pages (from-to)1307-1308
Number of pages2
JournalCzechoslovak Journal of Physics
Issue numberSUPPL. 3
Publication statusPublished - 1996


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