Instrumentation

 

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 = 0.12T^2.7 W/cm-K.

Keywords: Thermal conductivity; crystal quartz.

 

PACS: 65.40.-b

 

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