Abstract
Abstract
Nano-superconducting quantum interference devices (nano-SQUIDs) with high energy sensitivity and spatial resolution are essential in many applications such as single spin detection, nano-electromechanical vibration detection and microscale magnetic imaging. This paper studies a Dayem-type niobium nano-SQUID using focus ion beam milling technology. The device has two 42 nm × 60 nm nano-bridges and an integrated on-chip Nb modulation flux line located beside the SQUID loop with a 100 nm nanogap. The non-hysteretic temperature range of the nano-SQUID is about 1.4 K from 4.6 K to 6.0 K, which could broaden the operation temperature range of the device. The maximal transfer coefficient V
Φ and peak-to-peak voltage ΔV are 8.53 mV/Φ
0 and 430 μV at 4.8 K, respectively.
Funder
National Natural Science Foundation of China
National Key R&D Program of China
Subject
Applied Mathematics,Instrumentation,Engineering (miscellaneous)
Cited by
3 articles.
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