ESTIMATION OF ALPHA-PARTICLE INDUCED HOT-SPOT SIZE IN NB FILM USING ABRIKOSOV VORTICES

Authors
PALMIERI VG CRISTIANO R FRUNZIO L NAPPI C PAGANO S GUBANKOV VN LISITSKII MP PEPE G AKOH I TAKADA S NAKAGAWA H
Citation
Vg. Palmieri et al., ESTIMATION OF ALPHA-PARTICLE INDUCED HOT-SPOT SIZE IN NB FILM USING ABRIKOSOV VORTICES, Czechoslovak journal of Physics, 46, 1996, pp. 2881-2882
Citations number
4
Categorie Soggetti
Physics
Journal title
Czechoslovak journal of Physics → ACNP
ISSN journal
00114626
Volume
46
Year of publication
1996
Supplement
5
Pages
2881 - 2882
Database
ISI
SICI code
0011-4626(1996)46:<2881:EOAIHS>2.0.ZU;2-#
Abstract
A new experimental method for estimation of alpha-particle induced hot spot size in Nb films is proposed. The method is based on the jump-li ke motion of Abrikosov vortices induced by the impact of a single alph a-particle (Am-241 5.5 MeV) on a superconducting film. Preliminary exp eriments were carried out on a high quality ''small'' Nb-AlOx-Nb Josep hson tunnel junction with circular geometry and area 2500 mu m(2) (len gth smaller than lambda(j)) at T = 4.2 K. A preliminary value of d ap proximate to 2.5 mu m is obtained for die dimension of the hot spot re gion.