Abstract
We investigated the application of a magnetic ribbon to a highly sensitive magnetic sensor. The sensor employs the impedance change in a coupled magnetic ribbon when a radio frequency (rf) current is passed through it and an external magnetic field is applied. When the non-uniform external field was applied the coupled ribbon structure was conformed to have high sensitivity, which was about ten times higher than that in the uniform external field. This phenomenon was attributed to the magnetostatic coupling between coupled magnetic ribbons.