Date of Award
3-1-2014
Document Type
Dissertation
Degree Name
Ph.D.
Department
Physics and Astronomy
First Advisor
Barry L. Zink, Ph.D.
Keywords
Heat capacity, Johnson noise, Low temperature, Thermal trasport
Abstract
Calorimetric measurments and thermal transport measurments through a-SixNy 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.
Recommended Citation
Bassett, Dain, "Measurement of Low Temperature Thermal Properties of Microcalorimeters Using Johnson Noise Thermometry" (2014). Electronic Theses and Dissertations. 58.
https://digitalcommons.du.edu/etd/58
Provenance
Received from ProQuest
Rights holder
Dain Bassett
File size
113 p.
Copyright date
2014
File format
application/pdf
Language
en
Discipline
Physics