1. LONGITUDINAL AND TRANSVERSE COILED GIANT MAGNETOIMPEDANCE TRANSDUCERS PRINCIPLE, MODELING AND PERFORMANCES
- Author
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C. Coillot, Francisco Alves, G. Chanteur, J. Moutoussamy, Laboratoire de Physique des Plasmas (LPP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de génie électrique de Paris (LGEP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Supérieure d'Electricité - SUPELEC (FRANCE)-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)
- Subjects
010302 applied physics ,Materials science ,Magnetic domain ,Acoustics ,010401 analytical chemistry ,Giant magnetoimpedance ,01 natural sciences ,0104 chemical sciences ,law.invention ,Magnetic field ,[SPI.TRON]Engineering Sciences [physics]/Electronics ,Transverse plane ,Magnetic anisotropy ,Nuclear magnetic resonance ,law ,0103 physical sciences ,Eddy current ,Electrical impedance ,Excitation - Abstract
International audience; New Giant Magneto-Impedance structures are studied both experimentally and theoretically. These transducers are made with one or two anisotropic nanocrystalline ribbons and the magnetic excitation is provided by coils mounted either in transverse or longitudinal direction. Very high sensitivities up to 1000V/T have been achieved even at low excitation frequencies from 5kHz to 500kHz and low consumption driving current (5-10mA). The Eddy current phenomenon and magnetic domain considerations are used to determine a semi-theoretical model of impedance. Intrinsic sensitivity computation approach emphasizes on the role of the differential magnetic permeability in coiled GMI detection performances.
- Published
- 2009