-A A +A
We present an experimental investigation of nanoSQUIDs based on niobium nitride films. Niobium nitride has a relatively high critical temperature and a large upper critical magnetic field, making it a good material for superconducting electronics working in high magnetic field. We have fabricated nanoSQUIDs using electron beam lithography lift-off technique and deposition of niobium nitride films by magnetron sputtering at room temperature. The characterization of nanoSQUIDs was performed at 4.2 K and it consists mainly of current–voltage (IV) characteristics and critical current as a function of external magnetic field (magnetic pattern). The fabricated nanoSQUIDs show a hysteretic IV characteristic and they present a multi-values magnetic pattern. We show that by reducing the critical current by ion etching it is possible to obtain nanoSQUIDs with a single value magnetic pattern suitable for magnetic particle …
IOP Publishing
Publication date: 
29 Dec 2016

R Russo, E Esposito, A Crescitelli, E Di Gennaro, C Granata, A Vettoliere, R Cristiano, M Lisitskiy

Biblio References: 
Volume: 30 Issue: 2 Pages: 024009
Superconductor Science and Technology