Interplay between as grown defects and heavy ion induced defects in YBCO films
- Politecnico di Torino (Italy)
- C.N.R. Ist. di Cibernetica, Arco Felice (Italy)
- INFN-Catania (Italy). Lab. Nazionali del Sud
The dominating pinning mechanism in YBa{sub 2}Cu{sub 3}O{sub 7{minus}x} thin film has been investigated by means of resistivity and ac susceptibility measurements and by structural characterizations. The aim of the work is to determine optimal pinning conditions in order to prevent the field-induced drop of the critical current density. The Clem and Sanchez model is used to extract critical current values from the susceptibility data. In this framework, the role of columnar-like defects is extensively studied. The formation of columnar pins was promoted by a suitable modification in the preparation process. In addition, columnar tracks of different density were induced by Au-ion irradiation. Analysis of the critical current dependence on the magnetic field reveals that linearly-correlated defects are effective in improving the vortex lattice stability in matching regions of field and temperature.
- OSTI ID:
- 687433
- Report Number(s):
- CONF-9810174-; ISSN 0217-9792; TRN: 99:010386
- Journal Information:
- International Journal of Modern Physics B, Vol. 13, Issue 9-10; Conference: 9. national congress on high temperature superconductivity (SATT9), Ravenna (Italy), 6-9 Oct 1998; Other Information: PBD: 20 Apr 1999
- Country of Publication:
- United States
- Language:
- English
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