Measurements of a low-temperature mechanical dissipation peak in a single layer of Ta2O5 doped with TiO2

Martin, I. et al. (2008) Measurements of a low-temperature mechanical dissipation peak in a single layer of Ta2O5 doped with TiO2. Classical and Quantum Gravity, 25(5), Art. 055005. (doi:10.1088/0264-9381/25/5/055005)

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Abstract

Thermal noise arising from mechanical dissipation in oxide coatings is a major limitation to many precision measurement systems, including optical frequency standards, high-resolution optical spectroscopy and interferometric gravity wave detectors. Presented here are measurements of dissipation as a function of temperature between 7 K and 290 K in ion-beam-sputtered Ta2O5 doped with TiO2, showing a loss peak at 20 K. Analysis of the peak provides the first evidence of the source of dissipation in doped Ta2O5 coatings, leading to possibilities for the reduction of thermal noise effects.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Rowan, Professor Sheila and Martin, Dr Iain and Reid, Professor Stuart and MacLaren, Dr Ian and Hough, Professor James
Authors: Martin, I., Armandula, H., Comtet, C., Fejer, M.M., Gretarsson, A., Harry, G., Hough, J., Mackowski, J.-M.M., MacLaren, I., Michel, C., Montorio, J.L., Morgado, N., Nawrodt, R., Penn, S., Reid, S., Remillieux, A., Route, R., Rowan, S., Schwarz, C., Seidel, P., Vodel, W., and Zimmer, A.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Classical and Quantum Gravity
Publisher:Institute of Physics
ISSN:0264-9381
ISSN (Online):1361-6382
Published Online:12 February 2008

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
459312Investigations in Gravitational Radiation.Sheila RowanScience & Technologies Facilities Council (STFC)ST/I001085/1Physics and Astronomy