Simulation of Magnetic Erasure Due to Transient Slider-Disk Contacts

Author

Ovcharenko, Andrey ; Yang, Min ; Chun, Kaynam ; Talke, Frank E.

Author_Institution

Center for Magn. Recording Res., Univ. of California, La Jolla, CA, USA

Volume

46

Issue

3

fYear

2010

fDate

3/1/2010 12:00:00 AM

Firstpage

770

Lastpage

777

Abstract

Erasure of magnetic information due to transient slider-disk contacts is investigated. A three-dimensional thermal-mechanical model of a transient contact between a slider and a multilayered thin film disk is developed. Temperature and plastic strain distributions in the contact zone are evaluated and erasure of information is determined based on a simplified erasure criterion. The effect of material properties and impact conditions on erasure is determined for disks with glass and aluminum substrate. Design recommendations for minimization of erasure are discussed.

Keywords

aluminium; disc drives; glass; magnetic heads; magnetic multilayers; magnetic thin films; mechanical contact; plastic deformation; substrates; Al; SiO₂; aluminum substrate; glass substrate; magnetic erasure simulation; magnetic heads; magnetic information erasure; material properties; multilayered thin film disk; plastic strain distribution; temperature distribution; three-dimensional thermal-mechanical model; transient slider-disk contact; Magnetic analysis; Magnetic anisotropy; Magnetic field induced strain; Magnetoelasticity; Magnetostriction; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Plastics; Temperature; Thermal stresses; Magnetic erasure; multilayered media; slider-disk contact; thermal-mechanical model; transient contact;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2009.2035092

Filename

5415812