Catastrophic loss of superconductivity in ion-irradiated films of YBa2Cu3O7-δ

Chrisey, D. B.; Summers, G. P.; Maisch, W. G.; Burke, E. A.; Elam, W. T.; Herman, H.; Kirkland, J. P.; Neiser, R. A.
September 1988
Applied Physics Letters;9/12/1988, Vol. 53 Issue 11, p1001
Academic Journal
We have investigated the effects of low fluence (<10[sup 14] cm[sup -2]) 63 MeV H[sup +] and 65 MeV He[sup 2+] irradiation of prototype thin films of YBa[sub 2]Cu[sub 3]O[sub 7-δ] produced by a plasma-arc spray technique. The observed change in the resistance versus temperature behavior is much more dramatic than that observed for films produced by other techniques and resembles qualitatively a bond percolation threshold. The radiation sensitivity of these plasma-arc spray films is concluded to be due to poor intergranular characteristics. This information is being used to modify the processing steps to improve the properties of films produced by this technique.


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