Title :
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
fDate :
6/1/2007 12:00:00 AM
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);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2007.892325
