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Scanning electron micrograph of a nanosensor showing SQUID loop and the Dayem nanobridge Josephson junctions. A schematic draw of the device including the micrometric integrated coil for the calibration operations is shown in the upper figure.
Current-voltage characteristic of a hysteretic nano-SQUID measured at . The inset shows the critical current as a function of the external magnetic flux.
Experimental data (dots) and theoretical predictions in the moderately damping limit (solid lines) of the switching current distribution (P) and the escape rates vs the bias current of a nano-SQUID measured at different temperatures. The capacitance is and the other fitting parameters are as follows: (a) , , at , (b) , , , at , (c) , , , at , and (d) , , , at .
Magnetic flux resolution as function of the temperature of a nano-SQUID working as a trigger. It represents the minimum external magnetic flux required to induce a switching from the metastable zero voltage state to the dissipative one.
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