Flux pinning enhancement in melt-processed YBa2Cu3O7 with extended nanodefects

Shlyk, L.; Krabbes, G.; Fuchs, G.; Nenkov, K.
February 2005
Applied Physics Letters;2/28/2005, Vol. 86 Issue 9, p092503
Academic Journal
Melt-processed YBa2Cu3O7 (YBCO), containing a random array of Y–Ba–Cu–Ir–O nanostructures (about 20–150 nm in diameter and several μm in length) has been grown. The pinning efficiency of the resulting YBCO nanocomposite is superior to Li-doped or undoped melt-processed YBCO at higher magnetic fields. At 77 K, the irreversibility field increases more than 8 T in the presence of the extended nanodefects. The increase of the effective activation energy of the YBCO nanocomposite is nearly twice that of the Li-doped material.


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