Thin-film magnetic material and process of production thereof.

摘要

A thin-film magnetic material is formed on a polymer substrate. The material exhibits large Barkhausen discontinuity without intentional application of external tensile or torsional stress. The thin-film material may be produced by a sputtering technique wherein the normal to the substrate is directed obliquely to a target member. A biasing magnetic field in proximity to the substrate may also be used during film formation, and the substrate may be supported by a curved holder or 6 cylindrical roll-to-roll apparatus. The thin-film thus produced may be used as a marker in an article surveillance system or as a magnetic sensor.