Intermetallic magnetically readable medium

An identification card or tag, a key, an anti-counterfeiting measure, or an anti-forging measure, comprising:

• an intermetallic readable medium;
• and
• a magnetically readable surface,
• wherein the magnetically readable surface contains one or more indentations therein smaller than 1 mm in depth forming first magnetically readable regions, and
• wherein the intermetallic readable medium comprises an intermetallic material with the magnetically readable surface, wherein:
• the magnetically readable surface contains one or more first magnetically readable regions of the intermetallic material surrounded by one or more second magnetically readable regions of the intermetallic material,
• the one or more first magnetically readable regions have a higher magnetic reading than the one or more second magnetically readable regions, and wherein the second magnetically readable regions are paramagnetic, and/or
• the one or more first magnetically readable regions define magnetically readable coding, one or more plastically deformed regions on the magnetically readable surface, a plurality of indentations, a barcode, a number, and/or a character recognition information;
• and/or
• the one or more first magnetically readable regions comprise a plurality of plastically deformed regions having the same or different size and/or degree of deformation;
• and/or
• the one or more first magnetically readable regions comprise a plurality of plastically deformed regions are not demagnetizable by magnetic forces.