Sub-Kelvin ac magnetic susceptometry
Abstract
Designing an apparatus for experiments that operate deep into the milliKelvin regime requires a careful selection of materials and construction techniques, and often entails balancing mutually contradictory requirements. In the case of magnetic susceptibility measurements, this involves choosing materials that realize both high thermal conductivity for good heat sinking and low electrical conductivity for minimal eddy-current heating. A coil mounting system with a completely nonmetallic construction, achieved through the use of a sapphire skeleton and a machined carbon-fiber body, resolves this dilemma. This system permits the use of large ac magnetic field amplitudes at kHz frequencies and above, opening the door to studies of the nonlinear dynamics of a wide variety of magnetic systems that were previously inaccessible.
Additional Information
© 2013 American Institute of Physics. (Received 19 July 2012; accepted 9 December 2012; published online 2 January 2013). We are indebted to H. Krebs for his valuable guidance in machining the carbon fiber parts. This work was supported by the U.S. DOE Basic Energy Sciences (Grant No. DE-FG02-99ER45789).Attached Files
Published - 1.4773231.pdf
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Additional details
- Eprint ID
- 46919
- Resolver ID
- CaltechAUTHORS:20140707-163024080
- Department of Energy (DOE)
- DE-FG02-99ER45789
- Created
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2014-07-14Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field