HAMR emulation on carbon overcoat and lubricant for near field transducer and magnetic media using surface-enhanced Raman sensors

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    A plasmonic sensor is used for emulation of near field transducer (NFT). Some overcoat films (thickness of 1nm) were coated on Au nanoparticles (NPs) on a convex quartz glass substrate (plasmonic sensor). Heating behavior of the films was examined by laser heating using novel Raman spectroscopic tools, i.e. surface-enhanced Raman scattering (SERS) with the plasmonic sensor, a continuous laser heating tool, in-situ observation of spectra and temperature with a high speed time-resolved measurement. The heating temperature of tetrahedral carbon (ta-C) film in He gas is lower than that in air. This is because the thermal conductivity of He is larger than air. Few spectral change of ta-C film (thickness of 1nm) on Au NP’s is observed except initial change in around 100 s at the temperature around 500?, which corresponds to the temperature of the carbon overcoat (COC) for the media temperature of 327? (600K, Currie temperature for CoPt alloy). Some carbide films, i.e. SiC, TiC, and WC, showed high heat resistance, that is, few spectral change was observed. It is found that lubricant is evaporated from the COC on magnetic media and transferred to the plasmonic sensor.

    Original languageEnglish
    Title of host publicationASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017
    PublisherAmerican Society of Mechanical Engineers
    ISBN (Electronic)9780791858103
    DOIs
    Publication statusPublished - 2017 Jan 1
    EventASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017 - San Francisco, United States
    Duration: 2017 Aug 292017 Aug 30

    Other

    OtherASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017
    CountryUnited States
    CitySan Francisco
    Period17/8/2917/8/30

    ASJC Scopus subject areas

    • Control and Systems Engineering
    • Information Systems
    • Hardware and Architecture

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  • Cite this

    Yanagisawa, M., Kunimoto, M., & Homma, T. (2017). HAMR emulation on carbon overcoat and lubricant for near field transducer and magnetic media using surface-enhanced Raman sensors. In ASME 2017 Conference on Information Storage and Processing Systems, ISPS 2017 American Society of Mechanical Engineers. https://doi.org/10.1115/ISPS2017-5431