Abstract
We investigated the temperature dependence of the dielectric susceptibility of amorphous silica below 300 mK. The influence of glass matrix and hydroxyl concentration (<OH − >) was studied to investigate the suitability for thermometry. We obtained Suprasil samples with <OH − > between 200 and 1000 ppm by annealing in vacuum. We also measured commercial Homosil glass. The sensitivity is proportional to <OH − >, but saturation of the dielectric susceptibility occurs at the same temperature for all samples.
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van Rooijen, R., Marchenkov, A., Akimoto, H. et al. Dielectric Properties of Vitreous Silica with Various Hydroxyl Concentrations. Journal of Low Temperature Physics 110, 269–274 (1998). https://doi.org/10.1023/A:1022520329931
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DOI: https://doi.org/10.1023/A:1022520329931