1 December 2007 Hybrid recording on bit-patterned media using a near-field optical head
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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.
Tetsuya Nishida, Takuya Matsumoto, Fumiko Akagi, Hiroyuki Hieda, Akira Kikitsu, Katsuyuhi Naito, Tetsunori Koda, Naoki Nishida, Hiroshi Hatano, 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

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