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Superconducting transition edge sensor using dilute AlMn alloys



Steven Deiker, William B. Doriese, Gene C. Hilton, Kent D. Irwin, William H. Rippard, Joel N. Ullom, Leila R. Vale, Steve T. Ruggiero, Anthony Williams, B. Young


We have fabricated a bolometer using a transition-edge sensor (TES) made of Al doped with Mn to suppress the superconducting critical temperature !Tc" of Al from #1 K to #100 mK. The resulting detector exhibits low-frequency noise consistent with theory, with a noise-equivalent power of 7.5!10−18 W/ $Hz. The addition of Mn impurities did not significantly increase the heat capacity of the TES. In addition, the detector is surprisingly insensitive to applied magnetic fields. The use of AlMn alloy films in arrays of TES detectors has advantages in simplicity of fabrication when compared to traditional bilayer fabrication techniques.
Applied Physics Letters


Aluminum, bolometer, Cryogenic sensors, manganese, superconducting transition temperature, Transition Edge Sensor, x-rays


Deiker, S. , Doriese, W. , Hilton, G. , Irwin, K. , Rippard, W. , Ullom, J. , Vale, L. , Ruggiero, S. , Williams, A. and Young, B. (2004), Superconducting transition edge sensor using dilute AlMn alloys, Applied Physics Letters, [online], (Accessed June 18, 2024)


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Created July 6, 2004, Updated February 19, 2017