Large change of the giant magnetoresistance behavior after changing the spacer from Cu to CuMn alloy in Co/spacer/Co structures

Abstract

The giant magnetoresistance ͑GMR͒ effects in sandwiched Co/Cu/Co and Co/CuMn/Co structures have been investigated. The GMR oscillates with the spacer thickness for both cases, but is nearly antiphased. With diluted Mn atoms in the Cu spacer, the GMR curve as a function of the magnetic field changes a lot, and the saturation/switching field for GMR can be reduced greatly compared with that in Co/Cu/Co systems. This may indicate one way to obtain a highly sensitive GMR.

Integrated properties of large lateral photovoltage and positive magnetoresistance in Co/Mn/Co/c-Si structures

“…The corresponding switching fields are about 1000 and 1500 Oe, separately. They are much bigger than that obtained in our previous work on Co/CuMn/Co [9]. Doping Mn in the Cu spacer in Co/Cu/Co structures can lead to a dramatic decrease of switching fields.…”

Structural and magnetic properties of Al doped Co–Ag granular films: temperature dependence of magnetoresistance

“…To reduce the saturation field in coupled systems some methods were used which influenced the interlayer coupling between ferromagnetic layers. The studies on GMR multilayer structures showed that the saturation/switching field can be reduced by addition of a small amount of Al in Co layer [15], or Mn in Cu spacer [16], in Co/Cu multilayer structures. One might easily ask what the situation would be if the magnetic metal is doped with Al or Mn in the granular films.…”