Title

Superconducting Transition Edge Sensor Using Dilute AlMn Alloys

Document Type

Article

Publication Date

9-17-2004

Publisher

American Institute of Physics

Abstract

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 ∼1Kto∼100mK. The resulting detector exhibits low-frequency noise consistent with theory, with a noise-equivalent power of 7.5×10−18W/√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.

Comments

Copyright © 2004 American Institute of Physics Publishing. Reprinted with permission.

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