High-Tc Superconducting Quantum Interference Filters (SQIFs) made by ion irradiation

Abstract

Superconducting Quantum Interference Filters (SQIFs) are arrays of superconducting loops of different sizes including Josephson Junctions (JJ). For a random distribution of sizes, they present a non-periodic response to an applied magnetic field, with an extended linear regime and a sizable field sensitivity. Such properties make SQIFs interesting devices to detect the magnetic component of electromagnetic waves at microwave frequencies. We have used the highly scalable technique of ion irradiation to make High Tc SQUIDs and SQIFs based on commercial YBa2Cu3O7 films, and studied their properties. Both display optimum performances as a function of temperature and bias current, that can be understood in the frame of numerical simulations that we developed. The role of asymmetries and spread in JJ characteristics (routinely found in HTSc technologies) is described : ion irradiation based devices appear robust against them. We finally present results on SQIF made with 2000 SQUID in series, showing a transfer function dV/dB ~ 1000V/T .

16 pages, 6 figures

References in corpus (1)

• Quadratic Mixing of Radio Frequency Signals using Superconducting Quantum Interference Filters

Cited by in corpus (7)

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• Static and Radio-frequency magnetic response of high Tc Superconducting Quantum Interference Filters made by ion irradiation
• Superconducting proximity effect in $d$-wave cuprate/ graphene heterostructures
• A high-temperature superconducting weak-link defined by ferroelectric field-effect
• On the Path to High-temperature Josephson Multi-junction Devices
• Temporal Evolution of Defects and Related Electric Properties in He-Irradiated YBa${}_2$Cu${}_3$O${}_{7-\delta }$ Thin Films