Thick YBa2Cu3O7-x+BaSnO3 films with enhanced critical current density at high magnetic fields

Varanasi, C. V.; Burke, J.; Wang, H.; Lee, J. H.; Barnes, P. N.
September 2008
Applied Physics Letters;9/1/2008, Vol. 93 Issue 9, p092501
Academic Journal
The thickness dependence was studied for the critical current density (Jc) of YBa2Cu3O7-x(YBCO)+BaSnO3 (BSO) nanocomposite films. These films showed a significantly reduced decline of the Jc with thickness, especially at high magnetic fields. For example, a 2 μm thick YBCO+BSO film had a Jc∼3×105 A/cm2 at 5 T as compared to a typical Jc of 2.4×103 A/cm2 at 5 T for a 300 nm thick YBCO film. The thick YBCO+BSO films maintained high Tc (>88 K) and had a high density (2.5×1011/cm2) of continuous BSO nanocolumns that likely contributed for the observed Jc enhancements.


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