Multiple magnetic image reflection in perpendicular recording

D. Litvinov, R. W. Gustafson, A. Kuznetsov, M. H. Kryder, S. Khizroev

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

Abstract

In a typical perpendicular system, writing is done by the trailing edge of the trailing pole (TP) of a single pole head (SPH). The recording field is controlled by the electrical current in a magnetizing coil. However, due to the use of a soft underlayer (SUL) there is an additional source of the magnetic flux, which indirectly contributes to the net recording field under the TP. Due to the multiple magnetic image reflection (MIR) effect, the magnetic flux can be extracted from the recording layer (RL) region under the leading pole (LP) and transferred to the region under the TP. It should be stressed that a DC-erased perpendicular medium in the presence of only one or no "mirrors" generates no stray field at all. The fact that a field of approximately 1.4 kOe can be extracted from a DC-erased medium, indicates that the MIR is clearly a multiplication process, in which the LP and SUL act as two magnetic "mirrors" that effectively displace the magnetic charges from the surfaces of the recording layer to "infinity." The intention of this paper is to theoretically and experimentally study in detail the consequences of the MIR on the recording characteristics of a recording system.

Original languageEnglish (US)
Title of host publicationINTERMAG Europe 2002 - IEEE International Magnetics Conference
EditorsJ. Fidler, B. Hillebrands, C. Ross, D. Weller, L. Folks, E. Hill, M. Vazquez Villalabeitia, J. A. Bain, Jo De Boeck, R. Wood
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)0780373650, 9780780373655
DOIs
StatePublished - 2002
Externally publishedYes
Event2002 IEEE International Magnetics Conference, INTERMAG Europe 2002 - Amsterdam, Netherlands
Duration: Apr 28 2002May 2 2002

Publication series

NameINTERMAG Europe 2002 - IEEE International Magnetics Conference

Conference

Conference2002 IEEE International Magnetics Conference, INTERMAG Europe 2002
Country/TerritoryNetherlands
CityAmsterdam
Period4/28/025/2/02

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering
  • Surfaces, Coatings and Films

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