A Write Head Integrated With a Solid-Immersion-Lens System for Heat-Assisted Magnetic Recording

Author

Kojima, Naoto ; Ide, Naoki ; Urakawa, Yoshiyuki ; Kaneko, Masahiko

Author_Institution

Mater. Labs., Sony Corp., Tokyo

Volume

43

Issue

6

fYear

2007

fDate

6/1/2007 12:00:00 AM

Firstpage

2208

Lastpage

2210

Abstract

We have developed for heat-assisted magnetic recording a novel write head in which a magnetic writer and a near-field optical lens system are integrated. The single-pole type (SPT) write head is embedded in the hemispherical lens of a solid immersion lens (SIL) system, which has an effective NA of 1.44 at a wavelength of 405 nm. The SPT head, which has high magnetic efficiency and minimizes light scattering, consists of a main pole and vertical-turns type (VTT) coils. With an FWHM spot diameter of 130 nm and a main pole 2 mum wide, the head is estimated to be capable of small-spot writing

Keywords

magnetic heads; magnetic lenses; magnetic recording; heat-assisted magnetic recording; light scattering; near-field optical lens systems; single-pole type write head integration; small-spot writing; solid-immersion-lens systems; vertical-turns type coils; Coils; Heat-assisted magnetic recording; Integrated optics; Lenses; Light scattering; Magnetic heads; Optical recording; Optical scattering; Solids; Writing; Heat-assisted magnetic recording (HAMR); perpendicular magnetic recording; single-pole-type (SPT) head; solid-immersion lens (SIL);

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2007.892325

Filename

4202809