%0 Journal Article
%A Bui, Dinh Tu
%A Hung, T.Q.
%A Thanh, N.T.
%A Danh, T.M.
%A Nguyen, Huu Duc
%A Kim, CheolGi
%D 2008
%F SisLab:144
%J Journal of Applied Physics
%K Hall effect;Hall effect devices;biological techniques;ferromagnetic materials;interface magnetism;iridium alloys;iron alloys;magnetic anisotropy;magnetic sensors;magnetoresistance;manganese alloys;nickel alloys;0707Df;8575Nn
%N 7
%P 074701-074701
%T Planar Hall Bead Array Counter Microchip with NiFe/IrMn Bilayers
%U https://eprints.uet.vnu.edu.vn/eprints/id/eprint/144/
%V 104
%X The planar Hall effect (PHE) magnetic bead array countermicrochip integrating 24 of single sensors based on a simple NiFe/IrMn bilayer structure with a patterned size of 3×3 μm2 has been fabricated and characterized. Single PHE sensors exhibit a sensitivity of about 2.5 mΩ/Oe. It was well applied for single Dynabeads® M-280 detection, where one bead can induce a signal change, ΔV∼2.2 mV, under the applied magnetic field of 20 Oe and a sensing current of 2 mA. This type of microchip is promising for quickly detecting and identifying multiple biological agents in the environment.