We have demonstrated magnetostrictive nanowire (NW) array-based pressure sensing that utilizes magneto-mechanical transduction in an NW array and electro-magnetic transduction in a giant magnetoresistance (GMR) magnetic field sensor. The pressure sensing is performed by pressing the vertically aligned multilayered Fe80Ga20/Cu NW array against the GMR surface causing NW deflections. Micromagnetic simulations were used to visualize changes in NW magnetization state and resulting stray fields with applied mechanical strain. This magneto-mechanical transduction was similar to that measured experimentally by the GMR sensors with applied pressure.
Bibliographical noteFunding Information:
This work was supported by NSF under Grant ECCS 1231993 and 1232218.
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