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Title: Effects of intrinsic magnetostriction on tube-topology magnetoelectric sensors with high magnetic field sensitivity

Three quasi-one-dimensional magnetoelectric (ME) magnetic field sensors, each with a different magnetostrictive wire material, were investigated in terms of sensitivity and noise floor. Magnetostrictive Galfenol, iron-cobalt-vanadium, and iron-nickel wires were examined. Sensitivity profiles, hysteresis effects, and noise floor measurements for both optimally biased and zero-biased conditions are presented. The FeNi wire (FN) exhibits high sensitivity (5.36 mV/Oe) at bias fields below 22 Oe and an optimal bias of 10 Oe, whereas FeGa wire (FG) exhibits higher sensitivity (6.89 mW/Oe) at bias fields >22 Oe. The sensor of FeCoV wire (FC) presents relatively low sensitivity (2.12 mV/Oe), due to low magnetostrictive coefficient. Each ME tube-topology sensor demonstrates relatively high sensitivity at zero bias field, which results from a magnetic shape anisotropy and internal strain of the thin magnetostrictive wire.
Authors:
; ; ; ;  [1] ; ; ;  [2]
  1. Department of Electrical and Computer Engineering, Northeastern University, Boston, Massachusetts 02115 (United States)
  2. Baotou Research Institute of Rare Earths, Baotou, Inner Mongolia 014030 (China)
Publication Date:
OSTI Identifier:
22273759
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; COBALT; ELECTRICAL PROPERTIES; HYSTERESIS; INTERMETALLIC COMPOUNDS; IRON; MAGNETIC FIELDS; MAGNETOSTRICTION; NICKEL; NOISE; ONE-DIMENSIONAL CALCULATIONS; SENSITIVITY; SENSORS; STRAINS; TOPOLOGY; VANADIUM