FLUX PINNING IN YBA2CU3O7 THIN-FILMS GROWN BY DC MAGNETRON SPUTTERING
1992 (English)In: Cryogenics (Guildford), ISSN 0011-2275, E-ISSN 1879-2235, Vol. 32, 1084-1088 p.Article in journal (Refereed) Published
Thin films of YBa2Cu3O7 (YBCO) were deposited on single crystalline LaAlO3 substrates using d.c. magnetron sputtering. The quality of the films has been assessed by X-ray diffraction; YBa2Cu3O7 grows epitaxially with the c-axis parallel to the substrate normal. For some choices of the deposition parameters in the sputtering process, it was found that secondary phases were precipitated in the films. By a deliberate choice of deposition parameters, semi-coherently grown Y2O3 (yttria) inclusions could be obtained. They had square platelet or cubical shapes with sizes from 5 - 20 nm and thickness approximately 10 nm. The superconducting properties of the YBa2Cu3O7 films were investigated using SQUID magnetometry. Magnetization measurements on films with different densities of semicoherent Y2O3 inclusions indicate an enhanced flux pinning capability with increasing inclusion density.
Place, publisher, year, edition, pages
1992. Vol. 32, 1084-1088 p.
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:uu:diva-195540DOI: 10.1016/0011-2275(92)90032-6OAI: oai:DiVA.org:uu-195540DiVA: diva2:607946
CONF ON CRITICAL CURRENTS IN HIGH T(C) SUPERCONDUCTORS, VIENNA, AUSTRIA, APR 22-24, 19922013-02-262013-02-262013-02-26