Accession Number:

ADA561615

Title:

Microstructure and Critical Current Density of YBa2Cu3O7-x + BaSnO3 Thick Films Grown with Pre-Mixed Pulsed Laser Ablation Target (Postprint)

Descriptive Note:

Conference paper

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIR/POWER DIV/MECHANICAL ENERGY CONVERSION BRANCH

Personal Author(s):

• Barnes, P. N.
• Varanasi, C. V.
• Burke, J.
• Brunke, L.
• Wang, H.
• Lee, J. H.

Report Date:

2010-01-01

Pagination or Media Count:

9.0

Abstract:

YBa2Cu3O7-x YBCO BaSnO3 BSO thin films with BSO nanocolumns have been shown to have improved critical current density Jc in applied magnetic fields. Previously, a sectored target was used to grow thick 2.5 micron YBCO BSO films. In the present study, a premixed YBCO BSO 20 mol target was used to grow thick films 3 micron to determine if similar high quality thick films can be obtained as with the sectored target approach. In the case of the premixed target, BSO material is continuously supplied as opposed to the sectored target method. YBCO BSO thick film samples processed using a premixed target were also found to have high Jc at high fields with Jc 104 Acm2 at 8 T at 77 K, whereas typical YBCO films carry only 102 Acm2. Transmission electron microscopy TEM on these films indicated that BSO nanocolumns with a diameter of 8-11 nm extend through the thickness of the films. The critical transition temperature Tc for the films was found to be 87 K, regardless of thickness.

Descriptors:

• *HIGH TEMPERATURE SUPERCONDUCTORS
• *THICK FILMS
• CRITICAL TEMPERATURE
• CURRENT DENSITY
• DEGRADATION
• MAGNETIC FIELDS
• MICROSTRUCTURE
• SUPERCONDUCTIVITY
• THICKNESS
• THIN FILMS
• TRANSITION TEMPERATURE

Subject Categories:

• Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE