Probing the magnetization reversal of microstructured permalloy cross by planar hall measurement and magnetic force microscopy

In this paper, we investigate the magnetization reversal at the junction of a single layer microstructured permalloy cross via magnetoresistance measurement, planar Hall measurement, and magnetic force microscope (MFM). Magnetoresistance (MR) measurements were carried out with a nominal dc current introduced and the voltage drop measured across the longitudinal voltage pair under the magnetic field applied parallel/perpendicular to the current direction, whereas the planar Hall was studied with the same setup but the voltage drop was measured across the transverse Hall voltage pair. A transverse voltage measurement of permalloy cross in which the magnetization reversal process of arms induced the rotation of Mj, thus introducing a dramatic change of magnetic scattering correlated to transverse voltage.