Pinning Effect Induced by Underlayer in TbFeCo Magnetic Recording Media

Abstract

Pinning effect induced by a grainlike structure on top of a TbFeCo recording layer with an Al or Ag underlayer is investigated. We confirm that the pinning effect depends on the surface structure of the recording layer as well as the underlayer. The Al-underlayered TbFeCo medium shows higher recording density during thermally assisted magnetic recording and higher coercivity than those of the Ag-underlayered one. We can observe that only the Al-underlayered TbFeCo medium has the grainlike structure on top of the TbFeCo recording layer, which reflects well a grainlike structure on the Al underlayer's surface. It indicates that the surface profile of not only the underlayer but also the TbFeCo recording layer laminated onto the underlayer is necessary for inducing the strong pinning effect in the TbFeCo magnetic recording media.

Interlayer exchange coupling modulated spin-orbit torque and multi-state switching in GdCo/Ru/GdCo heterostructures

“…The PMA of reference sample 1 is stronger than that of reference sample 2 by comparing the difference of R H and coercivity in figure 1(b). Several aspects are known to affect the PMA in RE-TM amorphous alloy films, including the single-ion anisotropy [38], composition modulation [38] and interface factors induced by underlayer materials [39][40][41][42].…”

Fabrication of Photothermal Silver Nanocube/ZIF-8 Composites for Visible-Light-Regulated Release of Propylene

“…In our previous works, we developed a series of photoresponsive adsorbents with introduced azobenzenes, and the release of adsorbates was driven by the isomerization of azobenzenes by UV−vis-light irradiation. 35,36 It should be stated that the isomerization of azobenzenes is also the main approach of regulating adsorption Recently, surface plasmon resonance (SPR) of metal nanocubes (e.g., Ag, Au, Pd, and Ni) has attracted increasing attention for its ability of remotely generating heat upon light irradiation, 37−40 which is promising in various fields such as thermally assisted magnetic recording, 41,42 thermal cancer treatment, 43,44 and catalysis. 33,40,45 This approach of generating heat is completely different from that used in industrial adsorption, which is not applicable for adsorbents with poor thermal conductivity.…”

“…Recently, surface plasmon resonance (SPR) of metal nanocubes (e.g., Ag, Au, Pd, and Ni) has attracted increasing attention for its ability of remotely generating heat upon light irradiation, − which is promising in various fields such as thermally assisted magnetic recording, , thermal cancer treatment, , and catalysis. ,, This approach of generating heat is completely different from that used in industrial adsorption, which is not applicable for adsorbents with poor thermal conductivity. If metal nanocubes can be encapsulated in MOFs, heat can be generated from the interior to the exterior of MOFs, achieving the rapid release of adsorbents without heating the whole fixed bed.…”