Nano-superconducting quantum interference devices with continuous read out at milliKelvin temperatures

作者：Hazra D^*; Kirtley J R; Hasselbach K

来源：Applied Physics Letters, 2013, 103(9): 093109.

DOI：10.1063/1.4819762

We describe aluminum-niobium-tungsten trilayer Nano-Superconducting Quantum Interference Devices (NanoSQUIDs) that can be read out continuously down, in temperature, to at least 230 mK. They show voltage oscillations up to at least 20 mT in field. A voltage modulation of 500 mu V, voltage sensitivity of 2 mV/U Phi(0), and white noise floor better than 5 X 10(-5) Phi(0)/root Hz have been obtained. Flux noise places them between conventional low impedance SQUIDs and standard nanoSQUIDs. High sensitivity and ease of implementation make this new kind of nanoSQUID attractive for magnetic detection schemes on the nanoscale and low temperature scanning SQUID microscopy.

• 出版日期2013-8-26