Special Section on Nanophotonics in Japan

Hybrid recording on bit-patterned media using a near-field optical head

[+] Author Affiliations
Tetsuya Nishida

Hitachi, Ltd., Central Research Laboratory

Takuya Matsumoto

Hitachi, Ltd.

Fumiko Akagi

Hitachi, Ltd., Central Research Laboratory

Hiroyuki Hieda, Akira Kikitsu, Katsuyuki Naito

Toshiba Corporation

Tetsunori Koda

Hitachi Maxell, Ltd.

Naoki Nishida, Hiroshi Hatano

Konica Minolta Opto, Inc.

Masakazu Hirata

Seiko Instruments Inc.

J. Nanophoton. 1(1), 011597 (December 27, 2007). doi:10.1117/1.2835452
History: Received December 1, 2007; Revised December 11, 2007; Accepted December 11, 2007; December 27, 2007; Online December 27, 2007
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Abstract

We have demonstrated hybrid recording on magnetic bit-patterned media by a near-field optical head with plasmon probe. The near-field plasmon probe "nanobeak" that uses a triangular metallic plate with a three-dimensionally tapered apex can provide a highly efficient optical spot as small as 16 nm x 20 nm. The bit-patterned media consist of a Co (0.3 nm)/Pd (0.7 nm) multilayer of 20-nm-thick magnetic nanodots each with a diameter of 20 nm and a period of 30 nm. We confirmed magnetic single-dot recording on the Co/Pd bit-patterned media. Hybrid recording simulation results suggest that hybrid recording on bit-patterned media can achieve significant data-density recording, even when the magnetic dot size is less than 5 nm. For practical use, we made a prototype of nanodot circularly aligned Co/Pd bit-patterned media, and also demonstrated light delivery method using either solid immersion optics or an optical fiber.

© 2007 Society of Photo-Optical Instrumentation Engineers

Topics

Near field

Citation

Tetsuya Nishida ; Takuya Matsumoto ; Fumiko Akagi ; Hiroyuki Hieda ; Akira Kikitsu, et al.
"Hybrid recording on bit-patterned media using a near-field optical head", J. Nanophoton. 1(1), 011597 (December 27, 2007). ; http://dx.doi.org/10.1117/1.2835452


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