100 Gb/in^2垂直記録向け単磁極/TMRヘッド

概要

論文の詳細を見る
Single-pole writers and TMR readers for 100 Gb/in^2 perpendicular recording were fabricated and their recording performance was tested. Data erasure due to remanence magnetization of the main pole in the single-pole writer occurs when the pole width is 200 nm or less. The erasure can be suppressed by reducing the throat height of the main pole, Narrow-track writers with a pole width of 150 nm show good write ability for a medium with high coercivity of 6.5 kOe. The TMR reader shows high sensitivity of 40 mV/μm at a magnetic track width of 124 nm. The halfwidth of the microtrack profile with a perpendicular medium is narrower than that with a longitudinal medium. This is due to a larger spacing loss for low-linear-density data in perpendicular recording. The noise in TMR heads is dominated by the shot noise.
社団法人日本磁気学会の論文
2003-03-01