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    • 124. 发明授权
    • Method of measuring magnetic fields on magnetically recorded media using
a scanning tunneling microscope and magnetic probe
    • 使用扫描隧道显微镜和磁性探针测量磁记录介质上的磁场的方法
    • US5264794A
    • 1993-11-23
    • US947693
    • 1992-09-21
    • Edward R. BurkeIsaak D. MayergoyzAmr A. AdlyRomel D. Gomez
    • Edward R. BurkeIsaak D. MayergoyzAmr A. AdlyRomel D. Gomez
    • G01Q20/00G01Q60/00G01R33/038G01R33/12G11B5/00G01R33/00
    • G01Q60/56B82Y35/00G01Q60/02G01Q60/16G01R33/0385G01R33/1207G11B5/00B82Y25/00G11B2209/02Y10S977/84Y10S977/849Y10S977/861Y10S977/865Y10S977/872Y10S977/901
    • The present invention discloses a method of measuring magnetic fields on magnetically recorded media. The method entails replacing the metal tip typically used with a scanning tunneling microscope with a flexible thin-film nickel of iron magnetic probe. The present invention describes a mathematical equation that relates probe position to magnetic field strength. In order to establish a tunneling current between the magnetic probe and the magnetically recorded media, any protective layer on the magnetically recorded media is removed. The magnetic probe and the magnetically recorded media may be coated with at least three-hundred angstroms of gold in order to reduce spurious probe deflections due to oxide growths on either the magnetic probe or the magnetically recorded media. The scanning tunneling microscope is designed to maintain a constant tunneling current between the probe and the item being scanned. The present invention uses the scanning tunneling microscope to scan the recording tracks of magnetically recorded media. Any change in the magnetic field of the magnetically recorded media will cause a change in the tunneling current. The microscope will change the position of the probe in order to maintain a constant tunneling current. These changes in position are recorded as an image. A mathematical equation that relates probe position to magnetic field strength is then used to extract the magnetic fields of the magnetically recorded media from the recorded image of probe positions.
    • 本发明公开了一种在磁记录介质上测量磁场的方法。 该方法需要用铁磁探头的柔性薄膜镍替代通常用扫描隧道显微镜使用的金属尖端。 本发明描述了一种将探头位置与磁场强度相关联的数学方程。 为了在磁探头和磁记录介质之间建立隧穿电流,磁性记录介质上的任何保护层都被去除。 磁探针和磁记录介质可以涂覆有至少三百埃的金,以便减少由于磁探针或磁记录介质上的氧化物生长引起的假探针偏转。 扫描隧道显微镜被设计成在探头和待扫描的物品之间保持恒定的隧道电流。 本发明使用扫描隧道显微镜扫描磁记录介质的记录轨道。 磁记录介质的磁场的任何变化将导致隧穿电流的变化。 显微镜将改变探头的位置,以保持恒定的隧道电流。 这些位置变化被记录为图像。 然后将探头位置与磁场强度相关联的数学方程用于从记录的探针位置的图像中提取磁记录介质的磁场。