I Martin et al 2008 Class. Quantum Grav. 25 055005 doi:10.1088/0264-9381/25/5/055005
I Martin1, H Armandula2, C Comtet3, M M Fejer4, A Gretarsson5, G Harry6, J Hough1, J-M M Mackowski3, I MacLaren1, C Michel3, J-L Montorio3, N Morgado3, R Nawrodt7, S Penn8, S Reid1, A Remillieux3, R Route4, S Rowan1, C Schwarz7, P Seidel7, W Vodel7 and A Zimmer7
Show affiliationsThermal 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.
68.60.Bs Mechanical and acoustical properties
73.50.Td Noise processes and phenomena
04.80.Nn Gravitational wave detectors and experiments
Condensed matter: electrical, magnetic and optical
Issue 5 (7 March 2008)
Received 13 November 2007, in final form 14 January 2008
Published 12 February 2008
I Martin et al 2008 Class. Quantum Grav. 25 055005
Maurizio Porfiri 2009 Smart Mater. Struct. 18 015016
Risto M Nieminen 2009 Modelling Simul. Mater. Sci. Eng. 17 084001
Matthew A Taddy et al 2009 Inverse Problems 25 085001
I A Ivanov and A S Kheifets 2008 J. Phys. B: At. Mol. Opt. Phys. 41 095002
Madoka Nishimura and Yoshiaki Tanii 2009 J. Phys. A: Math. Theor. 42 095401
2009 Plasma Sources Sci. Technol. 18 049901
V R Coffman et al 2008 Modelling Simul. Mater. Sci. Eng. 16 065008
Edin Sarajlic et al 2009 J. Micromech. Microeng. 19 074001
P Klimas 2008 J. Phys. A: Math. Theor. 41 095403