Spatial Nonuniformity of the Sensitivity
and the Errors of Induction Magnetometers

G. A. Kapustin

Kurchatov Institute Russian Research Center, pl. Kurchatova 1, Moscow, 123182 Russia

Received June 6, 2000

Abstract—Errors arising in the process of studying the magnetic and resistive properties of materials with the
use of pulsed induction magnetometers as a result of a local nonuniformity of the magnetometer sensitivity are
considered. It is shown that significant nonuniformity leads to distorted current–voltage characteristics of con-
ducting samples and to errors in determining the critical currents of superconductors, which are not eliminated
by the standard calibration procedure of magnetometers. Various designs of pickup probes for magnetometers
are analyzed from the point of view of the spatial uniformity of their sensitivity, and some recommendations
are given for their improvement.

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