Trailing shield head recording in discrete track media

Author

Greaves, S. ; Muraoka, H. ; Kanai, Y.

Author_Institution

Tohoku Univ., Sendai

fYear

2006

fDate

8-12 May 2006

Firstpage

482

Lastpage

482

Abstract

A finite element model of a SPT write head, recording medium and soft magnetic underlayer (SUL) is used to calculate the magnetic fields in the recording layer. Discrete tracks were formed only in the mesh of the recording layer, with the permeabilities of the land and grooves set to two and one respectively. The recording layer thickness was 13 nm and the average size of grains in the recording layer was 6 nm with a standard deviation of 12.5%. The anisotropy field of the recording layer, Hk, was varied to maximise the SNR. Readback waveforms were calculated from reciprocity, using the sensitivity function of a 60 nm wide MR head with a shield to shield spacing of 30 nm.

Keywords

finite element analysis; grain size; magnetic field effects; magnetic heads; magnetic permeability; magnetic recording; magnetic shielding; Readback waveforms; discrete track media; finite element model; grain size; magnetic fields; permeability; recording layer; sensitivity function; shield spacing; single pole type head; size 13 nm; size 30 nm; size 60 nm; soft magnetic underlayer; trailing shield head recording; Anisotropic magnetoresistance; Disk recording; Finite element methods; Magnetic anisotropy; Magnetic heads; Magnetic recording; Magnetic shielding; Permeability; Perpendicular magnetic anisotropy; Soft magnetic materials;

fLanguage

English

Publisher

ieee

Conference_Titel

Magnetics Conference, 2006. INTERMAG 2006. IEEE International

Conference_Location

San Diego, CA

Print_ISBN

1-4244-1479-2

Type

conf

DOI

10.1109/INTMAG.2006.376206

Filename

4261915