Magnetic microbead detection using the planar Hall effect

Abstract Magnetic sensors based on the planar Hall effect of exchanged-biased permalloy have been fabricated and characterized. It is demonstrated that the sensors are feasible for detecting just a few commercial 2.0 mm magnetic beads commonly used for bioseparation (Micromer-M, Micromod, Germany) and that the sensor sense current is sufficient to generate a signal from the beads.

On the Thermal Behavior of Giant Magnetoresistance Heads

The magnetic/mechanical spacing between the transducer and the disk significantly decrease