Abstract
Three new types of fluxgate magnetometers are presented in this paper, able to monitor the vector of the ambient field, all of them being based on the principle of rotational excitation field. The first type employs Yttrium- Iron Garnet (YIG) single crystal film, magnetized with rotational field on its plane, where the 2nd, 4th and 6th harmonics offer the three components of the ambient field with sensitivity better than 1 pT at 0.2 Hz, its size being 25 cubic centimeter. The second type is based on permalloy film, where the rotational excitation field on its plane offers change of magnetoresistance with sensitivity better than 10 pT at 1 Hz, uncertainty of 1 ppm and size ~ 8 centimeter. The third type, is based on amorphous film, where the rotational field mode offer sensitivity better than 100 pT at 1 Hz, uncertainty of 10 ppm and size ~ 10 cubic millimeter .
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