Galvanomagnetic Effect of Permalloy Wire under a Local Magnetic Field

摘要

The magnetoresistance of an Fe-Ni permalloy wire with a crossing Cu wire was investigated. In this system, the magnetic field produced by an electric current flowing in the Cu wire acts locally on a part of the Fe-Ni wire. The magnetization reversal of the Fe-Ni wire can be controlled by adjusting the strength and sense of the local field The results are explained by a simple model which assumes that an effective magnetic field is a sum of the external and local magnetic fields.