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Sub-Kelvin ac magnetic susceptometry

Schmidt, M. A. and Silevitch, D. M. and Woo, N. and Rosenbaum, T. F. (2013) Sub-Kelvin ac magnetic susceptometry. Review of Scientific Instruments, 84 (1). Art. No. 013901. ISSN 0034-6748. doi:10.1063/1.4773231.

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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.

Item Type:Article
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Silevitch, D. M.0000-0002-6347-3513
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).
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Department of Energy (DOE)DE-FG02-99ER45789
Issue or Number:1
Record Number:CaltechAUTHORS:20140707-163024080
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Official Citation:Sub-Kelvin ac magnetic susceptometry Schmidt, M. A. and Silevitch, D. M. and Woo, N. and Rosenbaum, T. F., Review of Scientific Instruments, 84, 013901 (2013), DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46919
Deposited By: George Porter
Deposited On:14 Jul 2014 15:05
Last Modified:10 Nov 2021 17:31

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