Surface nanostructuring and damage morphologies along 2 GeV gold-ion-implanted tracks

Citation
L. Gozzelino et al., Surface nanostructuring and damage morphologies along 2 GeV gold-ion-implanted tracks, PHIL MAG B, 80(5), 2000, pp. 1015-1024
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICSELECTRONIC OPTICAL AND MAGNETIC PROPERTIES
ISSN journal
13642812 → ACNP
Volume
80
Issue
5
Year of publication
2000
Pages
1015 - 1024
Database
ISI
SICI code
1364-2812(200005)80:5<1015:SNADMA>2.0.ZU;2-F
Abstract
Good-quality melt-textured YBa2Cu3O7-x materials with Y2BaCuO5 nonsupercond ucting inclusions were irradiated with 2 GeV gold ions in order to produce a surface layer with columnar defects. The final goal is to gain a basic un derstanding of the role of the surface columnar defects in determining thos e magnetic properties of the materials that are related to the vortex confi nement. The particle energy and the sample thickness were chosen in such a way that the percentage of irradiated volume is about 10%. In the paper the intrinsic structure and the damage morphology were analysed by means of tr ansmission electron microscopy studies in both cross-section and plan-view geometry. As a result, the columnar defect density, size and shape were obt ained. The irradiation produces parallel heavily damaged tracks whose diame ter is between 3 and 6 nm. The overlapping of some columnar defects was hig hlighted and had to be taken into account to understand the superconducting properties of irradiated samples. The defects affect an implanted layer of about 50 mu m. The measured thickness coincides, within the experimental e rrors, with the thickness calculated by means of the Monte Carlo TRIM simul ations.