Hall micromagnetometry on iron electrodes suitable for spin-polarized transport

Iron electrodes suitable as injectors and detectors for spin-polarized transport in ferromagnet/semiconductor hybrid devices are investigated by Hall micromagnetometry. The Hall effect generated by the stray field of the iron structures is measured for single electrodes and electrode pairs with the external magnetic field aligned in plane either parallel or perpendicular to their easy axes. The strength of the stray field of the double structure in the sensor area is comparable for both configurations. (C) 2002 American Institute of Physics.