Nanostructured magnetism studies of multilayers prepared on microstructured substrates

Abstract

A brief survey of giant magnetoresistance (GMR) studies using microfabrication techniques is presented. For non-coupled type GMR multilayers deposited onto substrates with V-shaped microgrooves, the MR in a CAP geometry (with the current at an angle to the plane) was measured and the CAP-MR ratios confirmed to be always larger than ordinary CIP-MR (with the current in-plane). CPP—MR ratios (with the current perpendicular to the plane) were estimated by extrapolation and analyzed by a series-resistor model. By depositing on V-grooves from a tilted direction, wire-shaped multilayers for the study of magnetization-reversal phenomena, and also samples for CPP-like MR measurements have been prepared. Results obtained for such samples are described.