Charakterisierung dünner Ferromagneten mit Hilfe der Barkhausenrausch-Mikroskopie

Abstract

Ferro-magnetic materials are extremely important in the recording of data and are manufactured in the form of thin coatings on data carriers or in the read-write heads of data storage instruments. The high storage capacities required can only be achieved providing that the coating system has homogeneous magnetic properties and low internal stresses. These properties can be achieved by the correct control of the processing parameters. Barkhausen noise microscopy offers the possibility of characterising such thin coatings at high resolution in terms of their structure, thickness, internal stresses and heat treated condition. The monstrated with reference to Sendust-coatings and coating systems for MR-sensors