ACTA

Effects of Core Dimensions and Manufacturing Procedure on Fluxgate Noise

M. Janošek^a, J. Vyhnánek^a, A. Zikmund^a, P. Butvin^b, B. Butvinová^b
^aDept. of Measurement, FEE, Czech Technical University in Prague, Technická 2, 166 27 Praha, Czech Republic
^bInstitute of Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84511 Bratislava, Slovakia

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The effect of demagnetizing factor and manufacturing procedure on noise of the fluxgate probes, manufactured from metallic glasses, is presented. The fluxgate probes were either tape-wound, or flat, wet-etched ringcore and race-track geometries. When combining low demagnetizing factor and high enough cross-section of the probe, a minimum in the noise dependence can be found. For 50 mm ringcores, in such minimum the noise value as low as 7 pT_RMS in 0.1-10 Hz frequency band was achieved, which is very low for an as-cast tape, and has not been reported before.

DOI: 10.12693/APhysPolA.126.104
PACS numbers: 75.75.-c, 75.30.-m, 75.50.-y, 07.55.-w, 75.70.-i