Media optimization for 3d microwave-assisted magnetic recording via response surface methodology

Kheong Sann Chan, Simon Greaves, Susanto Rahardja

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Microwave Assisted Magnetic Recording (MAMR) [1] is a novel technology developed to extend the areal density growth of magnetic recording. To achieve higher densities, grains with larger anisotropy and higher thermal stability are used to store the data, in order allow the grain size to be reduced. But this comes at the cost of the grains becoming more difficult to write, especially as the write head shrinks in proportion. At the time of writing with MAMR, an assisting, oscillating high-frequency (HF) field is applied, typically from a spin-torque oscillator (STO) that causes the grains to resonate, reducing the amount of write-field needed to switch the grains. In 3D-MAMR, this principle of magnetically resonating grains is also used, but in this case, in addition to assisting the writing of smaller high anisotropy grains, it is used to select a specific target layer for writing in a 2-layer recording system [2]. In this work we optimize the media parameters in a multi-layer media stack in 3D-MAMR with 2 magnetic recording layers (RL), each recording layer having a hard and a soft sub-layer linked through exchange-coupling as shown in Figure 1.

Original languageEnglish
Title of host publication2018 Asia-Pacific Magnetic Recording Conference, APMRC 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781538683781
DOIs
Publication statusPublished - 2019 Jan 3
Event2018 Asia-Pacific Magnetic Recording Conference, APMRC 2018 - Shanghai, China
Duration: 2018 Nov 152018 Nov 17

Publication series

Name2018 Asia-Pacific Magnetic Recording Conference, APMRC 2018

Conference

Conference2018 Asia-Pacific Magnetic Recording Conference, APMRC 2018
Country/TerritoryChina
CityShanghai
Period18/11/1518/11/17

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Media Technology
  • Mechanical Engineering

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