Design for cooling near-field transducer using surface plasmon polariton waveguide for heat-assisted magnetic recording

Heat-assisted magnetic recording (HAMR) is studied to realize a high recording density of over 4 Tbit/in.2. The HAMR process requires light to be concentrated into a small area, which becomes heated on a recording medium. We studied a plasmonic waveguide (PWG) for surface plasmon polariton (SPP) pro...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2018-09, Vol.57 (9S2), p.9
Main Authors: Nakagawa, Katsuji, Kimura, Kousuke, Hayashi, Yoshihiko, Tamura, Kyosuke, Ashizawa, Yoshito, Ohnuki, Shinichiro
Format: Article
Language:English
Subjects:
Diamond-like carbon
Diamonds
Lubricants
Magnetic recording
Magnetic tape
Polaritons
Wave propagation
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Summary:Heat-assisted magnetic recording (HAMR) is studied to realize a high recording density of over 4 Tbit/in.2. The HAMR process requires light to be concentrated into a small area, which becomes heated on a recording medium. We studied a plasmonic waveguide (PWG) for surface plasmon polariton (SPP) propagation, which can easily cool down the near-field transducer (NFT) at the end of the PWG. It is important for the PWG to efficiently concentrate SPP to the tip of a magnetic head. We analyzed a PWG structure with protection layers, such as diamond-like carbon (DLC) and lubricant layers, to concentrate SPP onto the media and to effectively heat the recording area while keeping the NFT temperature below 100 °C.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.57.09TB01