反正切垂直磁化单极型磁头读出波形分析

An Analysis of Readback Waveform of Isolated Arctangent Perpendicular Magnetization for a Single-Pole Head

本文对垂直磁记录方式的读出过程进行了理论分析.考虑到垂直磁记录方式的记录位长远小于单极型磁头厚度,在不计及漏磁的情况下,用镜像法推导了单层膜孤立反正切垂直磁化单极头读出波形电压表达式.分析表明,头盘结构参数对读出电压、读出分辨率等因素具有直接影响.

A theoretical analysis of the readback process for perpendicular magnetic recording is presented. The single-pole head is a special one for perpendicular magnetic recording. There are two possible single-pole head and medium arrangements in a perpendicular magnetic recording system, namely, a single-pole head with a single-layer medium or a single-pole head with a double-layer medium. Only the first arrangement is discussed in this paper. As the recording bit length for the perpendicular magnetic recording pattern is shorter than the head thickness, an expression for the readback voltage of an isolated perpendicular magnetization for the single-layer medium is derived by the image method with the leakage flux neglected. The effects of structure parameters of head and medium on the readback voltage or readback resolution can be easily seen from the expression.