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

Tetsuya Nishida; Takuya Matsumoto; Fumiko Akagi; Hiroyuki Hieda; Akira Kikitsu; Katsuyuhi Naito; Tetsunori Koda; Naoki Nishida; Hiroshi Hatano; Masakazu Hirata

doi:10.1117/1.2835452

1 December 2007 Hybrid recording on bit-patterned media using a near-field optical head

Tetsuya Nishida, Takuya Matsumoto, Fumiko Akagi, Hiroyuki Hieda, Akira Kikitsu, Katsuyuhi Naito, Tetsunori Koda, Naoki Nishida, Hiroshi Hatano, Masakazu Hirata

Author Affiliations +

Journal of Nanophotonics, Vol. 1, Issue 1, 011597 (December 2007). https://doi.org/10.1117/1.2835452

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 × 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.

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Tetsuya Nishida, Takuya Matsumoto, Fumiko Akagi, Hiroyuki Hieda, Akira Kikitsu, Katsuyuhi Naito, Tetsunori Koda, Naoki Nishida, Hiroshi Hatano, and Masakazu Hirata "Hybrid recording on bit-patterned media using a near-field optical head," Journal of Nanophotonics 1(1), 011597 (1 December 2007). https://doi.org/10.1117/1.2835452

Published: 1 December 2007

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