Microstructure and switching mechanism of stacked CoCrPt–SiO2 perpendicular recording media

L10-ordered high coercivity (FePt)Ag–C granular thin films for perpendicular recording

“…At x ¼0.1 and y¼50, which are regarded the optimized values, the grain size is 6.1 71.8 nm. This is close to the grain size of current CoCrPt-SiO 2 based PMR media, 6-8 nm [22][23][24]. By comparing the morphology of FePt grains in those images, we found that the spacing between the grains is reduced with increase in y.…”

Scanning Transmission Electron Microscopy Analysis of Grain Structure in Perpendicular Magnetic Recording Media

“…Obtaining a desirable nanostructure in the magnetic layer (ML), the topmost active layer in a hard disk layer stack (Figure ), is of critical importance to the performance of the device. , The ML is a continuous nanocomposite thin film of magnetic cobalt-alloy grains isolated from one another by an ideally nonmagnetic intergranular matrix. ,, To enhance the magnetic properties and maintain the required signal-to-noise ratio in the read and write processes, downscaling of the average ML grain size should be accompanied by tightening their size distribution . The average grain size in these recording media has reached nanometer scales, about 7 nm at present. ,− …”

Magnetic properties of granular CoCrPt:SiO2thin films deposited on GaSb nanocones

“…Prior to the deposition of the CoCrPt:SiO 2 film, a 5 nm thin Ta adhesion layer was DC-magnetron sputtered followed by a two-step (12 and 8 nm) Ru buffer layer. This double buffer layer promotes the easy axis of magnetization of the CoCrPt:SiO 2 grains to be perpendicular to the surface [31,[36][37][38][39][40]. The layer stack was covered by a 4 nm protective overcoat of diamond-like carbon (DLC).…”