Measurements of thermal conductivity in a crystal quartz substrate at 1.4 K
A. Colin
Universidad Politécnica de Puebla, Tercer carril del ejido Serrano s/n, San Mateo Cuanalá, 72640 Juan C. Bonilla, Puebla-México, Telephone: +52 (222) 774 66 64; Fax: +52 (222) 774 66 48 e-mail: angel.colin@uppuebla.edu.mx
Received 10 August 2012; ]]> Accepted 12 February 2013
Abstract
We carried out measurements of thermal conductivity in a crystal quartz substrate (900 ¡m thick) at temperatures of 1.4 K by using a pumped 4He cryostat. We applied a varied input power from 0.1 up to 1 mW to the heater placed at the end of the substrate, and we observed that the measured data give a temperature dependence of k = 0.12T2.7 W/cm-K.
Keywords: Thermal conductivity; crystal quartz.
PACS: 65.40.-b
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