We have experimentally and theoretically investigated the equivalent magnetic noise in a magnetoelectric Metglas/ 0.7Pb(Mg 1/3 Nb 2/3 )O 3 ‐0.3PbTiO 3 laminate sensor unit by considering the constituent noise sources of dielectric loss ( N DE ) and DC leakage resistance ( N R ). In the low frequency range ( f = 1 Hz), theory predicts that N R dominates the noise charge (1.6 times larger than N DE ), with a 1 Hz noise of 9.1\;{ pt}/√ Hz. The experimental equivalent magnetic noise was 10.8\;{ pt}/√ Hz. This observed value is slightly higher than the predicted one, which might be due to an oversimplification of the theoretical model in terms of electrical charge amplifier and external vibration noise sources. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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