Angular-dependent vortex pinning mechanisms in YBa[sub 2]Cu[sub 3]O[sub 7] coated conductors and thin films

Civale, L.; Maiorov, B.; Serquis, A.; Willis, J. O.; Coulter, J. Y.; Wang, H.; Jia, Q. X.; Arendt, P. N.; MacManus-Driscoll, J. L.; Maley, M. P.; Foltyn, S. R.
March 2004
Applied Physics Letters;3/22/2004, Vol. 84 Issue 12, p2121
Academic Journal
We compare the angular-dependent critical current density (J[sub c]) in YBa[sub 2]Cu[sub 3]O[sub 7] films deposited on MgO templates grown by ion-beam-assisted deposition (IBAD), and on single-crystal substrates. We identify three angular regimes in which pinning is dominated by different types of correlated and uncorrelated defects. Those regimes are present in all cases, but their extension and characteristics are sample dependent, reflecting differences in texture and defect density. The more defective nature of the films on IBAD turns into an advantage as it results in higher J[sub c], demonstrating that the performance of the films on single crystals is not an upper limit for the IBAD coated conductors. © 2004 American Institute of Physics.


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