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Title: Molybdenum-rhenium alloy based high-Q superconducting microwave resonators

Superconducting microwave resonators (SMRs) with high quality factors have become an important technology in a wide range of applications. Molybdenum-Rhenium (MoRe) is a disordered superconducting alloy with a noble surface chemistry and a relatively high transition temperature. These properties make it attractive for SMR applications, but characterization of MoRe SMR has not yet been reported. Here, we present the fabrication and characterization of SMR fabricated with a MoRe 60–40 alloy. At low drive powers, we observe internal quality-factors as high as 700 000. Temperature and power dependence of the internal quality-factors suggest the presence of the two level systems from the dielectric substrate dominating the internal loss at low temperatures. We further test the compatibility of these resonators with high temperature processes, such as for carbon nanotube chemical vapor deposition growth, and their performance in the magnetic field, an important characterization for hybrid systems.
Authors:
; ; ; ;  [1]
  1. Kavli Institute of Nanoscience, Delft University of Technology, P.O. Box 5046, 2600GA, Delft (Netherlands)
Publication Date:
OSTI Identifier:
22402415
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CARBON NANOTUBES; CHEMICAL VAPOR DEPOSITION; DIELECTRIC MATERIALS; FABRICATION; MAGNETIC FIELDS; MICROWAVE EQUIPMENT; MOLYBDENUM ALLOYS; QUALITY FACTOR; RESONATORS; RHENIUM ALLOYS; TRANSITION TEMPERATURE