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AFRL-RZ-WP-TP-2012-0157 COMPARATIVE STUDY BETWEEN SIMILARLY PROCESSED YBa 2 Cu 3 O 7x FILMS WITH Y 2 BaCuO 5 OR BaSnO 3 ADDITIONS ( POSTPRINT )
| Content Provider | Semantic Scholar |
|---|---|
| Author | Varanasi, Chakrapani V. Burke, Jack Brunke, Lyle Lee, Joon Hwan Wang, Haiyan Barnes, Paul N. |
| Copyright Year | 2012 |
| Abstract | A special (YBCO) target with a thin sector of second phase material, in this case either (Y211) or (BSO), was used to deposit YBCO films with non-layered nanoparticles on single crystal and biaxially textured Ni-5 at.% W substrates buffered with and YSZ layers(coated conductors). Although identical processing conditions were used, TEM images indicated that random Y211 nanoparticles in the case of YBCO+Y211, and evenly spaced BSO nanocolumns in the case of YBCO+BSO, form in the YBCO films. While YBCO plane buckling was observed at many places in the case of YBCO+Y211, a high density of stacking faults and dislocations were observed in the case of YBCO+BSO near the BSO columns. In transport critical current density angular dependence measurements, the absence of nanocolumns in YBCO+Y211 films resulted in the absence of a peak at 0 , , in vs. plots, as compared to a clear peak at 0 observed in YBCO+BSO films with the nanocolumns. The in-field measurements indicated small low-field enhancements at 77 K in YBCO+Y211 films but more than an order of magnitude improvement in high-field in YBCO+BSO films due to the differences in the microstructures. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://apps.dtic.mil/dtic/tr/fulltext/u2/a561588.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
