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http://dx.doi.org/10.4283/JMAG.2008.13.4.177

A Simple a.c. Magnetic Susceptometer Using self-inductance Measurement of a Single Coil Mounted on a Cryostat Cold Head  

Dho, Joong-Hoe (Dept. of Physics, Kyungpook National University)
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Abstract
A very simple a.c. magnetic susceptometer for use in a helium closed cycle cryostat is reported in this paper. This simple setup has only a single bobbin-less copper coil, instead of the primary coil and two secondary coils typically used in mutual-inductance types. The single bobbin-less copper coil is directly mounted on the cryostat cold head. A sample is attached on the inside wall of the copper coil using a thermal contact material and its a.c. magnetic susceptibility is obtained from the measurement of the self-inductance of the sample coil using an LCR meter or an impedance analyzer. Experimental details are described and illustrative measurements on magnetic and superconducting materials as a function of temperature are included. The performances and limitations of this simple a.c. magnetic suceptometer are also discussed.
Keywords
a.c. magnetic susceptibility; phase transition;
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