Abstract
In this paper we report on the effects of “surface columnar defects” (blind holes) generated by heavy ion irradiation by performing Field Emission Scanning Electron Microscopy (FESEM) imaging of the columns created across a selected set of specimens, ranging from YBa 2Cu 3O 7− x melt-textured bulks and Bi 2Sr 2Ca 2Cu 3O x monofilamentary tapes to YBa 2Cu 3O 7− x single crystals. Different ion fluences, resulting into modifying the superconducting properties, were sampled. A correlation between FESEM patterns and volume integrated measurements shows how surface columnar defects claim the leadership of the superconducting behaviors of the ion implanted samples.
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