Three-dimensional spin nanosensor based on reliable tunnel Josephson nano-junctions for nanomagnetism investigations

Granata, C; Vettoliere, A; Russo, R; Fretto, Matteo Andrea; De Leo, Maria; Lacquaniti, Vincenzo

doi:10.1063/1.4819463

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We present an ultra high sensitive three-dimensional nano Superconducting QUantum Interference Device (nanoSQUID) fabricated by using the Focused Ion Beam sculpting technique. Based on a fully niobium technology, the nanodevice consists in a niobium superconducting loop (0.2 μm2) interrupted by two nanometric Nb/Al-AlOx/Nb Josephson junctions. The nanoSQUID exhibited an intrinsic magnetic flux noise as low as 0.65 μΦ0/Hz1/2 corresponding to a spin noise less than 10 Bohr magnetons per unit of bandwidth. It has been successfully employed in nanoparticle magnetic relaxation measurements. Due to its excellent performance, reliability, and robustness, we believe that the proposed nanoSQUID offers a crucial step toward a wide employment of nanoSQUIDs in the nanoscience.

Titolo:	Three-dimensional spin nanosensor based on reliable tunnel Josephson nano-junctions for nanomagnetism investigations
Autori:	Granata, C Vettoliere, A Russo, R FRETTO, MATTEO DE LEO, MARIA LACQUANITI, VINCENZO mostra contributor esterni nascondi contributor esterni
Data di pubblicazione:	2013
Rivista:	APPLIED PHYSICS LETTERS
Abstract:	We present an ultra high sensitive three-dimensional nano Superconducting QUantum Interference Device (nanoSQUID) fabricated by using the Focused Ion Beam sculpting technique. Based on a fully niobium technology, the nanodevice consists in a niobium superconducting loop (0.2 μm2) interrupted by two nanometric Nb/Al-AlOx/Nb Josephson junctions. The nanoSQUID exhibited an intrinsic magnetic flux noise as low as 0.65 μΦ0/Hz1/2 corresponding to a spin noise less than 10 Bohr magnetons per unit of bandwidth. It has been successfully employed in nanoparticle magnetic relaxation measurements. Due to its excellent performance, reliability, and robustness, we believe that the proposed nanoSQUID offers a crucial step toward a wide employment of nanoSQUIDs in the nanoscience.
Handle:	http://hdl.handle.net/11696/31302
Appare nelle tipologie:	1.1 Articolo in rivista

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