MAGNETORESISTIVE SENSOR AND DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a magnetoresistive read sensor with improved sensitivity and stability.SOLUTION: The magnetoresistive sensor is a trilayer stack positioned between two electrodes. The trilayer stack has two free layers separated by a nonmagnetic layer and a biasing magnet positioned at the rear of the stack and separated from the air bearing surface by the stripe height distance. Current in the sensor is confined to regions close to the air bearing surface by an insulator layer to enhance reader sensitivity.