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Simultaneous determination of resistivity and susceptibility in an ac-susceptometer

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4 Author(s)
de Faria, C.C. ; Dept. de Fisica, Univ. Federal de Sao Carlos, Brazil ; de Oliveira, A.J.A. ; Horeira, F.M.A. ; Ortiz, W.A.

We derive expressions for the in-phase and quadrature components of the output voltage of a balanced double transformer of cylindrical symmetry, typically employed in laboratory ac susceptometers. The expressions are developed for the case of cylindrical samples of finite length, excited by low-frequency fields. Investigation of the conductivity dependence of the output voltage, carried out with samples of commercial copper of different radii, validates the expressions

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Magnetics, IEEE Transactions on  (Volume:31 ,  Issue: 6 )