Catastrophic magnetic flux avalanches in NbTiN superconducting resonators

Abstract

Macroscopic superconducting components are an important building block of various quantum circuits. Since several of the envisioned applications require exposure to magnetic fields, it is of utmost importance to explore the impact of magnetic fields on their performance. Here we explore the complex pattern of magnetic field penetration and identify its impact on the resonance frequency of NbTiN superconducting resonators by combining magneto-optical imaging and high-frequency measurements. At temperatures below approximately half of the superconducting critical temperature, the development of magnetic flux avalanches manifests itself as a noisy response in the field-dependent resonance frequency. Magneto-optical imaging reveals different regimes and distinguishes the impact of avalanches in the ground plane and resonator. Our findings demonstrate that superconducting resonators represent a valuable tool to investigate magnetic flux dynamics. Moreover, the current blooming of niobium-based superconducting radio-frequency devices makes this report timely by unveiling the severe implications of magnetic flux dynamics.

20 pages, 3 figures, 2 supp. figures, 3 supp. videos

References in corpus (13)

• Strong Coupling of a Spin Ensemble to a Superconducting Resonator
• Efficient and robust analysis of complex scattering data under noise in microwave resonators
• Microwave response of vortices in superconducting thin films of Re and Al
• Onset of dendritic flux avalanches in superconducting films
• Trapping a single vortex and reducing quasiparticles in a superconducting resonator
• Dielectric surface loss in superconducting resonators with flux-trapping holes
• Magnetic field resilient high kinetic inductance superconducting niobium nitride coplanar waveguide resonators
• Evidence of rf-driven branching of dendritic vortex avalanches in MgB2 microwave resonators
• A High-Resolution Combined Scanning Laser- and Widefield Polarizing Microscope for Imaging at Temperatures from 4 K to 300 K
• Improving superconducting resonators in magnetic fields by reduced field-focussing and engineered flux screening
• Magnetic hysteresis in the microwave surface resistance of Nb samples in the critical state
• In-situ measurement of the permittivity of helium using microwave NbN resonators
• Dendritic flux avalanches in a superconducting MgB2 tape

Cited by in corpus (5)

• Impact of border defects on the magnetic flux penetration in superconducting films
• Equidistant resonance jumps in superconducting coplanar resonators driven by Abrikosov vortices
• Thermally-controlled flux avalanche dynamics in bulk NbTi superconductor
• Magnetic-Field and Temperature Limits of a Kinetic-Inductance Traveling-Wave Parametric Amplifier
• Effects of the thin-film thickness on superconducting NbTi microwave resonators for on-chip cryogenic thermometry