High-resolution current sensor utilizing nanocrystalline alloy and magnetoelectric laminate composite Rev. Sci. Instrum. 83, 115001 (2012) A nonlinearity in the magnetoelectric coefficient, a Nonlin ME , of Metglas=Pb(Zr,Ti)O 3 (PZT) and Metglas=Pb(Mg 1=3 ,Nb 2=3 )O 3 -PbTiO 3 (PMN-PT) laminate sensors has been observed. This nonlinearity was found to be dependent on the dc magnetic bias (H dc ) and frequency of the ac drive field (H ac ). The maximum value of a Nonlin ME for both types of composites was found near the electromechanical resonance. For Metglas=PZT laminates, the maximum occurred under a finite bias of H dc %5 Oe; whereas, for Metglas=PMN-PT, the maximum was found near zero dc bias. One application for a Nonlin ME is a cross-modulation scheme that can shift low frequency signals to higher frequency to achieve lower noise floor. For Metglas=PMN-PT, a Nonlin ME has another application: removal of the necessity of a dc bias, which helps to design high-sensitivity sensor arrays and gradiometers.

HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.