8-${\rm Tb/in}^{2}$-Class Bit-Patterned Medium for Thermally Assisted Magnetic Recording

Relationship between temperature rise and thermal conductivity in a magnetic medium during heated dot magnetic recording

“…However, HAMR technology combined with L10 FePt-based bit-patterned media (BPM) is being investigated to expand the performance limit of granular media and to realize ultrahigh data storage densities in hard disk drives. 2,12,19,20,26) Ushiyama (2013) substantiated the feasibility of an areal density of over 5 Tb in −2 . This technology is known as HDMR.…”

“…However, the thermal conductivity of SiO 2 was based on the thermal conductivity of quartz glass. 2) Heat sink layers are generally used to dissipate heat. Moreover, a perfectly matched layer region (100 nm) was set at a location sufficiently distant from the NFT and BPM (500 nm) to avoid reflecting the plane wave at the boundary region, as shown in Fig.…”

“…However, in this approach, near-field light cannot easily reach the bottom of a recording layer. 2) Hence, the relationship between a medium's thermal properties and the write performance should be studied. In this study, we first investigated the relationship between the temperature rise in a recording layer (recording dots) and the thermal conductivity of a BPM for HDMR through numerical calculation.…”

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

“…The computational parameters of protection layers are shown in Table III. 31) The values of those parameters are decided from the values recommended by the ASRC and Advanced Storage Technology Consortium (ASTC). We still do not know the exact computational parameters of the lubricant and DLC, because the parameters of such thin layers have not been reported.…”

“…TableIII. Computational parameters of lubricant and DLC 31). Specific heatC (J kg −1 K −1 ) Thermal conductivity K (W m −1 K −1 ) Density D (kg m −3 )…”