公开(公告)号：WO2006126101A3

公开(公告)日：2007-03-29

申请号：PCT/IB2006002269

申请日：2006-05-26

Applicant: PHILIP MORRIS PROD

Inventor： DEEVI SEETHARAMA C ,  RAO KUDUMBOOR VENKAT ,  STROM VALTER ,  GU ZIYAN

IPC: G11B5/62 ,  C22C38/06 ,  G11B5/706 ,  H01F1/147

CPC classification number: G06K1/125 ,  C22C38/06 ,  G01R33/16 ,  G06K19/022 ,  G06K19/06196 ,  H01F1/047 ,  Y10T428/32

Abstract: An intermetallic or iron aluminide magnetically readable medium and a method of forming and reading the same are provided herein. Also provided is an identification card or tag, a key, an anti- counterfeiting measure, an anti-forging measure. The intermetallic or iron aluminide magnetically readable medium includes a magnetically readable surface, wherein the magnetically readable surface contains one or more first magnetically readable regions of the intermetallic or iron aluminide surrounded by one or more second magnetically readable regions of lower magnetism. Additionally, the intermetallic or iron aluminide magnetically readable medium can be coated, encapsulated or concealed within a material. By forming deformation induced localized magnetism (DILM) regios within a paramagnetic intermetallic material like iron aluminide, DILM regions having a higher magnetic reading than the surrounding paramagnetic material regions are created.

Abstract translation: 本文提供金属间化合物或铁铝化物磁性可读介质及其形成和读取方法。 还提供了身份证或标签，钥匙，防伪措施，防伪措施。 金属间化合物或铁铝磁性可读介质包括磁性可读表面，其中磁性可读表面包含由一个或多个较低磁性的可磁性可读区域包围的金属间化合物或铁铝化物的一个或多个第一磁性可读区域。 此外，金属间化合物或铁铝磁性可读介质可以被涂覆，封装或隐藏在材料内。 通过在顺磁性金属间化合物（如铁铝化物）内形成变形诱发的局部磁性（DILM）区域，产生具有比周围的顺磁性材料区域更高磁读数的DILM区域。