http://www.cnr.it/ontology/cnr/individuo/prodotto/ID19290
Trimming of Critical Current in LTc Josephson Devices by Laser Annealing (Articolo in rivista)
- Type
- Label
- Trimming of Critical Current in LTc Josephson Devices by Laser Annealing (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Alternative label
Granata C, Vettoliere A., Petti L., Rippa M., Ruggiero B., Mormile P., and Russo M. (2008)
Trimming of Critical Current in LTc Josephson Devices by Laser Annealing
in Journal of physics. Conference series (Print)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Granata C, Vettoliere A., Petti L., Rippa M., Ruggiero B., Mormile P., and Russo M. (literal)
- Pagina inizio
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- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Istituto di cibernetica \"Edoardo Caianiello\" (literal)
- Titolo
- Trimming of Critical Current in LTc Josephson Devices by Laser Annealing (literal)
- Abstract
- The authors report a new thermal annealing technique for Nb/Al-AlOx/Nb
Josephson devices based on laser heating. This technique allows to \"locally\" modify the
Josephson critical current density. In fact, it is possible the heating of a single circuit element
with a good spatial resolution using a focused Ar+ laser beam which is aligned by an optical
system on a selected junction of the sample. During the procedure, performed at room
temperature, a thermal camera provides a monitoring of the temperature distribution on the
whole chip. A continuous reduction of the critical current density up to about 40% has been
observed on high quality Josephson junction measured in liquid helium. Neighbouring
junctions have not exhibited any measurable change ensuring the effective capability to locally
modify the Josephson critical current density. The new technique has been employed to
recover noisy dc SQUID magnetometers with non optimal critical current values obtaining a
reduction of the spectrum density of magnetic field noise from about 30 to 2.5 fT/Hz ½ . (literal)
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