A miniature palladium-iron thermometer for temperatures down to 0.05 Kelvin

Magnetic thermometers are appealing at temperatures below about 0.1 Kelvin, because they avoid the noise self-heating problems associated with resistive thermometers. In particular, metallic magnetic thermometers add the advantages of chemical stability, high thermal conductivity, and ease in heat s...

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Bibliographic Details
Main Authors: Tuttle, J G, DiPirro, M J, Canavan, E R, Shirron, P J, Kunes, E, Hait, T P
Format: Conference Proceeding
Language:English
Online Access:Get full text
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Summary:Magnetic thermometers are appealing at temperatures below about 0.1 Kelvin, because they avoid the noise self-heating problems associated with resistive thermometers. In particular, metallic magnetic thermometers add the advantages of chemical stability, high thermal conductivity, and ease in heat sinking. In this work we describe a palladium-iron thermometer which was designed to be small and conveniently packaged and optimized for use at temperatures down to 0.05 Kelvin. The device showed Curie-Weiss behavior above about 0.06 Kelvin, and we achieved 41 nK/Hz temperature resolution at a temperature of 49 mK. We describe the design and operation of this thermometer and present the test results. (Author)
ISSN:0094-243X