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确定磁记录介质性能的磁性参数是使介质和最终的数据存储系统两者达到最佳性能的基础。对数字磁记录起主导作用的磁滞迴线参数是饱和磁化强度、剩余磁化强度、矫顽力和开关磁场分布。本文讨论获得这些参数的测量技术及其与数字记录性能的关系。一、准静态磁测量过去曾采用各种技术来测量磁性材料的磁滞迴线特性。最常用的技术是静态或准动态测量。对于磁记录材料,这些测量可采用 VSM和(?)-H 计进行。1.磁性参数的定义①饱和磁化强度 M_s 或饱和磁感应 B_s在米·千克·秒(MKS)和厘米·克·秒(GGS)单位制中,M_s 或 B_s 可采用下式定义:
The magnetic parameters that determine the performance of a magnetic recording medium are the basis for achieving the best performance for both the media and the resulting data storage system. Hysteresis loop parameters that dominate digital magnetic recording are saturation magnetization, remanent magnetization, coercivity and switching magnetic field distribution. This article discusses the measurement techniques for obtaining these parameters and their relationship to digital recording performance. First, quasi-static magnetic measurement In the past have used a variety of techniques to measure the magnetic hysteresis loop characteristics. The most commonly used technique is static or quasi-dynamic measurement. For magnetic recording materials, these measurements can be made with VSM and (?) - H gauge. 1. Definition of Magnetic Parameters ① Saturation magnetization M_s or saturation magnetic induction B_s is defined in MKS and GGS units and M_s or B_s can be defined as follows: