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Effect of light ion irradiation on the flux dynamics of YBa2 Cu3O7-δ thin films

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6 Author(s)
Arias, D. ; Dpto. Fisica Aplicada III, Univ. Complutense de Madrid, Spain ; Sefrioui, Z. ; Gonzalez, E.M. ; Villegas, J.E.
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Thin films of 123 cuprates (YBa2Cu3O7 ) grown by DC sputtering are irradiated with light ion (He+ ) at 80 keV and with doses in the range 1014-1015 cm-2. The point disorder defects, due to light ion irradiation, cause a systematic decrease of the critical temperature. The effect of light ion irradiation on the vortex phase behavior is explored by critical currents from transport and magnetization loops (solid vortex phase) and resistivity (liquid state) in perpendicular fields. Although point disorder does not significantly affect dissipation in the solid state, the dissipation in the liquid is governed by plastic deformation of vortices favored by point disorder pinning

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Applied Superconductivity, IEEE Transactions on  (Volume:11 ,  Issue: 1 )