スタティックテスタによる連続媒体とパターン垂直媒体のコンタクト記録・再生

概要

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We measured perpendicular magnetic recording media with a static tester to analyze the read-write characteristics (SN ratio, ATE, and recording margin) of future bit patterned media (BPM). We clarified that the measured current of a granular-type perpendicular magnetic recording mediums reproduction waveform at half pulse width, T50, and the magnetization transfer parameters, were small. The read-write resolving power is thought to improve and reproduce a steep magnetization transition through contact recording. Furthermore, we measured the BPM samples and ascertained that the actual measured values conformed to those calculated qualitatively. In addition, we found the dot pitch from a reproduction wave did not depend on the dot size, and it was almost the designed value, and we confirmed that the standard deviation was around 6% of the dot pitch at dot lengths longer than 40 nm.