Electric currents Galvanomagnetic effects Hall effect Magnetic field effects Sensor networks Sensors Applied magnetic fields Bead array counters Biological agents Dynabeads Magnetic beads Nife/irmn bilayers Planar Hall effects Sensing currents Signal changes Single sensors
Issue Date:
2008
Publisher:
Journal of Applied Physics
Citation:
Volume: 104, Issue: 7,
Abstract:
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 ? m2 has been fabricated
and characterized. Single PHE sensors exhibit a sensitivity of about 2.5 m/Oe. It was well applied for single
Dynabeads?? M-280 detection, where one bead can induce a signal change, ??V?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. ?? 2008 American Institute of
Physics.
