Ripka, P. - Jireš, F. - Macháček, M.: Fluxgate Sensor with Increased Homogeneity In: IEEE Transactions on Magnetics. 1990, vol. 26, p. 2038-2041. ISSN 0018-9464.
Several types of fluxgate sensors were developed for measuring microvariations of the earth's magnetic field. Sensor cores were produced by etching, leading to better geometric homogeneity and long-term stability. This technology makes it possible to produce oval-shape sensors with both higher sensitivity and low noise.