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首页> 外文会议>NATO Advanced Study Institute on Magnetic Storage Systems Beyond 2000, Jun 25-Jul 7, 2000, Rhodes, Greece >PARTICULATE MAGNETIC RECORDING MEDIA
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PARTICULATE MAGNETIC RECORDING MEDIA

机译：特定的磁记录媒体

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Magnetic recording media have dominated the arena of peripheral information storage throughout its 50 year-old history. They can be classified into paniculate and thin film types, with the former dominating the flexible storage media area (tape and floppy disks) while the latter has become the exclusive choice for rigid disk media. In this paper we review the properties, application areas, and the status of development in particulate magnetic recording media. In earlier years, the development of advanced particulate media was aimed at high coercivity, high magnetization, smaller and better-dispersed and oriented particles, and thinner magnetic layer coatings. Because the thinness of the magnetic layer is of extraordinary importance for high density recording performance, it was expected that the ultimate optimization would lead to thin metal films of high magnetization and high coercivity prepared by electron beam evaporation or sputtering. This expectation has not been realized for various technological and economic reasons: 1. Did not take into account the disadvantages of thin film media compared to particulate media with regard to cost, wear performance, corrosion, and media noise. 2. The development of double-coated particulate media which permit the fabrication of very thin magnetic coatings, thus obviating the thinness advantage of metal film media. 3. The extraordinary developments in high sensitivity magnetoresistive sensors (MR, GMR, Spin valves) which de-emphasize the importance of high magnetization but emphasize the importance of low media noise. The interplay of these considerations has resulted in the continued dominance of particulate media, even though thin film tapes are beginning to establish a presence in digital video applications. Among the advanced tape media, Barium ferrite has perhaps the best potential to achieve the ultimate recording densities, and to transition to perpendicular recording.
机译：在其50年的历史中，磁记录媒体一直主导着外围信息存储领域。它们可以分为圆锥型和薄膜型，前者在柔性存储介质区域（磁带和软盘）中占主导地位，而后者已成为刚性磁盘介质的唯一选择。在本文中，我们回顾了颗粒磁记录介质的特性，应用领域和发展状况。早些年，先进的颗粒介质的开发目标是高矫顽力，高磁化强度，更小和更好分散和定向的颗粒以及更薄的磁性层涂层。由于磁性层的厚度对于高密度记录性能至关重要，因此可以预期，最终的优化将导致通过电子束蒸发或溅射制备的具有高磁化强度和高矫顽力的金属薄膜。由于各种技术和经济原因，尚未实现这种期望：1.在成本，磨损性能，腐蚀和介质噪音方面，未考虑薄膜介质与颗粒介质相比的劣势。 2.发展了双面涂层的颗粒介质，其允许制造非常薄的磁性涂层，从而消除了金属膜介质的薄度优势。 3.高灵敏度磁阻传感器（MR，GMR，旋转阀）的非凡发展，不再强调高磁化的重要性，但强调了低介质噪声的重要性。这些考虑因素的相互影响导致了颗粒介质的持续统治，尽管薄膜磁带已开始在数字视频应用中占据一席之地。在先进的磁带介质中，钡铁氧体可能具有实现最终记录密度并过渡到垂直记录的最佳潜力。

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