Speaker
Description
Nitridized aluminum (NitrAl, for short), a superconducting form of nitrogen-doped aluminum, is a promising material for quantum circuit applications. Its critical temperature is enhanced in comparison to pure aluminum, it has shown resilience to magnetic fields in the order of Tesla and its kinetic inductance has been estimated to lie in the range of superinducting disordered materials. Due to all these reasons, this material has great potential for the manufacturing of qubits intended to be used in the QRADES experiment. Nonetheless, the factual value of the kinetic inductance of the material and an estimation of its losses still remain an unknown. In IFAE, we have shed some light into those aspects by the fabrication and measurement of superconducting resonators. We have developed recipes for patterning NitrAl circuits in different resistivity regimes, developed dedicated designs of resonant structures and conducted single-photon and multi-photon measurements of them, alongside temperature and power sweeps. In this talk, I will be presenting the results concerning those measurements and the conclusions that arise from the observed data and trends.