Abstract
Heat assisted magnetic recording (HAMR) is a promising next generation technology to achieve magnetic storage densities beyond 1 Tb/in2. In HAMR, a high coercivity magnetic media is temporarily heated above its Curie temperature, lowering the coercivity of the media below the value where magnetic reversal can be achieved using the field strength available from a conventional write head. The main challenge involved in HAMR is to deliver sufficient light to heat a magnetic medium over a sub-wavelength highly localized spot. Use of near-field optics is the only solution for this problem and requires development of a highly efficient near-field transducer (NFT). A C-shaped nano-aperture is the best candidate for an NFT in HAMR because of its ability to provide high transmission efficiency and a highly localized optical spot. In this presentation, HAMR and related challenges in reaching high areal bit densities will be introduced, and specific results and successful demonstration of HAMR with C-shaped nano-apertures will also be presented.
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