The authors have used an existing design of an inexpensive mutual inductance bridge circuit to build an AC susceptometer from 1.5 to 300K. The simple design of the entire system and the use of low-cost components are the special features of this system. The bridge has a sensitivity of 5*10 -7 EMU which can be improved further by using superior electronic components.
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Ramakrishnan et al. (1985) studied this question.
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