Experimental study of overwrite modulation in perpendicular magnetic recording

Author

Zhou, Y. ; Zhu, J.-G.

Author_Institution

Data Storage Syst. Center, Carnegie Mellon Univ., Pittsburgh, PA, USA

fYear

2005

fDate

4-8 April 2005

Firstpage

501

Lastpage

502

Abstract

Perpendicular magnetic recording is regarded as next generation recording technology for storage industry. However, overwrite modulation in perpendicular recording was not thoroughly studied. In longitudinal recording, old information modulates the newly recorded transitions through in-plane field arising from write field leading edge transitions. In this study, experimental perpendicular recording overwrite tests are performed on several different perpendicular media. It shows that modulation in perpendicular recording comes directly from demagnetization field of previously recorded bits. It also shows that write head effective switching field profile significantly affects the modulation behavior.

Keywords

demagnetisation; magnetic fields; magnetic heads; perpendicular magnetic recording; demagnetization field; overwrite modulation; perpendicular magnetic recording; perpendicular recording overwrite tests; switching field profile; write head; Frequency; Lungs; Magnetic heads; Magnetic modulators; Performance evaluation; Perpendicular magnetic recording; Solids; Spin valves; Testing; Writing;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2005. INTERMAG Asia 2005. Digests of the IEEE International

Print_ISBN

0-7803-9009-1

Type

conf

DOI

10.1109/INTMAG.2005.1463679

Filename

1463679