2008/02/12 by I Martin, H Armandula, C Comtet +20 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #High-pressure geophysics and materials #Photorefractive and Nonlinear Optics #Pulsars and Gravitational Waves Research #gr-qc
paper · pdf · doi:10.1088/0264-9381/25/5/055005
published as Class.Quant.Grav.25:055005,2008
openalex publication_date 2008/02/12 · arxiv created 2008/02/19 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/02
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 Ta 2 O 5 doped with TiO 2 , showing a loss peak at 20 K. Analysis of the peak provides the first evidence of the source of dissipation in doped Ta 2 O 5 coatings, leading to possibilities for the reduction of thermal noise effects.