Date of Award

1-1-2014

Document Type

Dissertation

Degree Name

Ph.D.

Department

Physics and Astronomy

First Advisor

Barry L. Zink

Keywords

heat capacity, johnson noise, low temperature, thermal trasport

Abstract

Calorimetric measurments and thermal transport measurments through a-SixxNy suspended membranes have been performed to further the understanding of low temperature thin film thermal transport, and understand the interesting physics present within an amorphous dielectric material. The thermal properties of several calorimeters have been measured to understand the geometric dependence on transport phenomenon. We analyze and compare our results with observations of previous measurements, and with those indicating quantum limited

thermal transport. We see strong indications of changes to the physical mechanism transporting heat through these materials as temperature changes from 50 mK to 2 K. We have also developed a relaxation calorimetric measurement for use with Johnson Noise Thermometry.

Provenance

Recieved from ProQuest

Rights holder

Dain J. Bassett

File size

113 p.

File format

application/pdf

Language

en

Discipline

Physics

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