A proposal of high-density, high -requency recording write head for perpendicular magnetic recording in the next generation

2014 Fiscal Year Final Research Report

• Project/Area Number: 24560425
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Electron device/Electronic equipment
• Research Institution: Niigata Institute of Technology
• Principal Investigator: KANAI Yasushi 新潟工科大学, 工学部, 教授 (00251786)
• Co-Investigator(Renkei-kenkyūsha): GREAVES Simon 東北大学, 電気通信研究所, 准教授 (60375152) ; MURAOKA Hiroaki 東北大学, 電気通信研究所, 教授 (20239479) ; YOSHIDA Kazuetsu 工学院大学, 工学部, 教授 (90327718)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 垂直磁気記録 / マイクロマグネティック解析 / 記録ヘッド

Outline of Final Research Achievements

For heat-assisted magnetic recording (HAMR), write head structure with dent for optical element, short yoke, and soft magnetic underlayer was proposed, which worked for high-frequency recording current. The maximum areal density of 8 terabit per square-inch was predicted with the write head.
For microwave-assisted magnetic recording (MAMR), tilted, not perpendicular to the media plane, spin-torque oscillator (STO) inserted into the tilted write head gap was proposed. The head had a large recording field and stable STO oscillation.

Free Research Field

工学