Peak effect at microwave frequencies in swift heavy on irradiated YBa2Cu3O7-δ thin films - Investigation of vortex dynamics

Tamalika Banerjee*, A. R. Bhangale, P. Raychaudhuri, D. Kanjilal, R. Pinto

*Corresponding author voor dit werk

OnderzoeksoutputAcademicpeer review

Samenvatting

The vortex dynamics at microwave frequencies in YBa2Cu3O7-δ (YBCO) films has been studied. We observe a peak in the microwave surface resistance Rs vs. T (temperature) plots at 4.88 GHz in some films in magnetic fields (upto 0.8 T) whereas a few films do not show a pronounced peak in their surface resistance. This is associated with the 'peak-effect' phenomenon and reflects the order-disorder transformation of the flux-line lattice near the transition temperature. Introduction of artificial pinning centers like columnar defects as a result of irradiation with 200 MeV Ag ion leads to the suppression of the peak in films exhibiting the 'peak-effect'. Interestingly, a peak is seen to develop in those films that initially did not show a peak in the surface resistance before irradiation. These results and the dynamics of the vortices at microwave frequencies for the unirradiated and irradiated films will be discussed.

Originele taal-2English
TitelMaterials for High-Temperature Superconductor Technologies
UitgeverijSpringer
Pagina's363-368
Aantal pagina's6
StatusPublished - 2002
Extern gepubliceerdJa
EvenementMaterials for High-Temperature Superconductor Technologies - Boston, MA, United States
Duur: 26-nov.-200129-nov.-2001

Publicatie series

NaamMaterials Research Society Symposium - Proceedings
UitgeverijSpringer
Volume689
ISSN van geprinte versie0272-9172

Conference

ConferenceMaterials for High-Temperature Superconductor Technologies
Land/RegioUnited States
StadBoston, MA
Periode26/11/200129/11/2001

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