MAGNETIC-PROPERTIES OF GIANT MAGNETORESIS TANCE FILMS WITH CO-OXIDE LAYER

Giant magnetoresistance(GMR) is actively investigated for high density magnetic recording. In particular, so-called sandwich films which ado pts a simple structure such as Co/Cu/Co has large magnetoresistive rat io. We have attempted to improve the sensitivity and the saturation fi eld of Si/CoOx/Co/Cu/NiFe sandwich films with CoOx layer made by react ive sputtering. In the sandwich films with magnetic CoOx layer, the sa turation field increases but the sensitivity decreases. Substituting n onmagnetic CoOx layer for the magnetic CoOx layer larger saturation fi eld and higher sensitivity can be obtained.