一、前言对于高密度记录媒质来说,薄磁胶片是最有应用前景的。人们对于当前记录材料表面的兴趣在于减小各涂层的厚度,同时以获得高信息量。由于高频信息只能被写在最表层,而对读过程又很重要的漏磁场又受表层磁场状态的极大影响,所以,知道记录介质在空气交界面处的磁特性是很重要的。在这方面,使人们感 I. Preface For high density recording media, thin magnetic film is the most promising. Interest in the surface of current recording materials has been to reduce the thickness of each coating while achieving a high level of information. Since high-frequency information can only be written on the outermost surface and the leakage magnetic fields, which are important to the reading process, are greatly influenced by the surface magnetic field conditions, it is important to know the magnetic properties of the recording medium at the air interface. In this regard, make people feel