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Mo/Au Bilayers Deposited by Sputtering at Room Temperature for Transition Edge Sensors Fabrication

AuthorsGonzález-Arrabal, Raquel ; Camón, Agustín; Parra-Borderías, María ; Fàbrega, Lourdes ; Anguita, José Virgilio ; Sesé Monclús, Javier ; Briones Fernández-Pola, Fernando
KeywordsTransition edge sensors
Superconducting device
X-ray detectors
Proximity effect
Sputtering deposition
Issue Date25-Jan-2008
CitationJournal of Low Temperature Physics 151(1-2): 239-244 (2008)
AbstractWe report on the fabrication and characterisation of Mo/Au bilayers which are intended to be used as high resolution cryogenic imaging spectrometers for next generation of X-ray Astrophysical observatories in space. Mo/Au bilayers have been deposited by sputtering at room temperature on Si3N4 bulk and membranes. The composition of the bilayers as well as their interfaces have been characterised by Rutherford Backscattering Spectroscopy (RBS). Results indicate absence of interdiffusion. Further structural characterization has been performed by X-ray diffraction and Atomic Force Microscopy. The transition temperature T c of the Mo/Au bilayers has been tuned by changing the Au layer thickness. Very sharp superconducting transitions have been observed with transition widths as small as 0.3 mK. These films look therefore extremely promising for the intended detectors, as well as for other applications in materials science and nanotechnology.
DescriptionFrom the issue entitled "Proceedings of the 12th International Workshop on Low Temperature Dectectors (LTD12)- Part I"
Publisher version (URL)http://dx.doi.org/10.1007/s10909-007-9638-9
Appears in Collections:(IMN-CNM) Artículos
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