Recently it has been proven that the magnetic response of magnetic nano-objects such as nanoparticles, nanobeads, and small cluster of molecules can be effectively measured by using a Superconducting Quantum Interference Device (SQUID) with a small sensitive area. Here, we present a high sensitivity nanoSQUID based on deep submicrometer Josephson tunnel junctions fabricated by a Focused Ion Beam (FIB) sculpting method. The nanosensor consists of a niobium superconducting loop (0.4 × 1.0 μm2) interrupted by two sandwich nanojunctions (Nb/Al-AlOx/Nb) having an area of about (300 × 300) nm2. An experimental investigation of the main characteristics of such nanodevice as a function of the temperature is presented.
Nanostructured superconductive sensors based on quantum interference effect for high sensitive nanoscale applications / Granata, C.; Ruggiero, B.; Talamo, O.; Fretto, M.; De Leo, N.; Lacquaniti, V.; Massarotti, D.; Tafuri, F.; Silbestrini, P.; Vettoliere, A.. - 431:(2018), pp. 25-29. (Intervento presentato al convegno 3rd National Conference on Sensors, 2016 tenutosi a ita nel 2016) [10.1007/978-3-319-55077-0_4].
Nanostructured superconductive sensors based on quantum interference effect for high sensitive nanoscale applications
Massarotti D.;Tafuri F.;
2018
Abstract
Recently it has been proven that the magnetic response of magnetic nano-objects such as nanoparticles, nanobeads, and small cluster of molecules can be effectively measured by using a Superconducting Quantum Interference Device (SQUID) with a small sensitive area. Here, we present a high sensitivity nanoSQUID based on deep submicrometer Josephson tunnel junctions fabricated by a Focused Ion Beam (FIB) sculpting method. The nanosensor consists of a niobium superconducting loop (0.4 × 1.0 μm2) interrupted by two sandwich nanojunctions (Nb/Al-AlOx/Nb) having an area of about (300 × 300) nm2. An experimental investigation of the main characteristics of such nanodevice as a function of the temperature is presented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
