Effects of successive proton irradiation on the peak effect in YBa[sub 2]Cu[sub 3]O[sub 7-δ] single crystals

Tobos, V.; Paulius, L. M.; Petrean, A. M.; Ferguson, S.; Snyder, J. W.; Olsson, R. J.; Kwok, W.-K.; Crabtree, G. W.
May 2001
Applied Physics Letters;5/14/2001, Vol. 78 Issue 20, p3097
Academic Journal
The effect of increasing the density of uncorrelated defects on the peak effect is studied in a detwinned YBa[sub 2]Cu[sub 3]O[sub 7-δ] single crystal. The defects were introduced with 9 MeV proton irradiation where the total dose ranged from 0.25x10[sup 15] to 2x10[sup 15] p/cm2. With each successive irradiation, the peak effect shifts down in field and is eventually suppressed in both the electrical resistivity and the dc magnetization by a sufficiently high irradiation dose. The peak effect reappears after a high temperature anneal, suggesting that it is primarily the point defects introduced by the irradiation which interfere with the formation of the peak effect. © 2001 American Institute of Physics.


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