Ultra low noise YBCO nanoSQUIDs implementing nanowires

Abstract

We present results on ultra low noise YBa${}_2$Cu${}_3$O${}_{7-\delta }$ nano Superconducting QUantum Interference Devices (nanoSQUIDs). To realize such devices, we implemented high quality YBCO nanowires, working as weak links between two electrodes. We observe critical current modulation as a function of an externally applied magnetic field in the full temperature range below the transition temperature $T_C$. The white flux noise below 1 $\mu {\Phi }_0/\sqrt{\mathrm{Hz}}$ at T = 8 K makes our nanoSQUIDs very attractive for the detection of small spin systems.

11 pages, 4 figures, submitted to Appl. Phys. Lett. 25/01/2014

References in corpus (2)

• Vortex-induced dissipation in narrow current-biased thin-film superconducting strips
• Little-Parks effect in single YBaCuO sub-micron rings

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