The Magnetically-Tuned Transition-Edge Sensor

• Published in: Journal of low temperature physics Vol. 176; no. 3-4; pp. 392 - 399
• Main Authors: Sadleir, John E., Lee, Sang-Jun, Smith, Stephen J., Busch, Sarah E., Bandler, Simon R., Adams, Joseph S., Eckart, Megan E., Chervenak, James A., Kelley, Richard L., Kilbourne, Caroline A., Porter, Frederick S., Porst, Jan-Patrick
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01-08-2014
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Electric potential; Low temperature physics; Magnetic fields; Magnetic Materials; Magnetism; Physics; Physics and Astronomy; Sensors; Stability; Superconductivity; Tuning; Voltage; Supeconductivity; Magnetic field dependence; Superconducting resistive transition width; Low temperature detectors; Superconducting weak-links
• ISSN: 0022-2291; 1573-7357
• DOI: 10.1007/s10909-014-1194-5

We present the first measurements on the proposed magnetically-tuned superconducting transition-edge sensor and compare the modified resistive transition with the theoretical prediction (Sadleir et al., IEEE Trans App Supercond 23:2101405,
2013
). A TES’s resistive transition is customarily characterized in terms of the unitless device parameters
α
and
β
corresponding to the resistive response to changes in temperature and current respectively. We present a new relationship between measured IV quantities (sensor current
I
and voltage
V
) and the parameters
α
and
β
and use these relations to confirm we have stably biased a TES with negative
β
parameter with magnetic tuning. Motivated by access to this new unexplored parameter space, we investigate the conditions for bias stability of a TES taking into account both self and externally applied magnetic fields.