TY - JOUR
T1 - The Network-Shaped Upheaval Structure in (002) Textured MgO Layer for L10 FePt-Based Granular Media with Columnar Nanostructure
AU - Shimizu, Akihiro
AU - Jeon, Seong Jae
AU - Hinata, Shintaro
AU - Jo, Shin
AU - Saito, Shin
N1 - Funding Information:
ACKNOWLEDGMENT This work was supported in part by the Advanced Storage Research Consortium (ASRC).
Publisher Copyright:
© 1965-2012 IEEE.
PY - 2019/7
Y1 - 2019/7
N2 - Search for amorphous materials with high crystallization temperature and investigation of crystal orientation, surface morphology, and composition distribution of MgO/bcc-Cr80Mn20/amorphous-Co60W40 underlayer were conducted. As a result, the crystallization temperature of amorphous-Co60W40 is higher than 620 °C and it proved to be suitable as texture inducing layer material. Also, it was found that a network-shaped upheaval structure corresponding to the grain size of the (002) plane oriented CrMn grains was formed on the surface of the (002) plane oriented MgO layer. By utilizing the surface roughness of the underlayer, we proposed a columnar isolated granular medium for heat-assisted magnetic recording (HAMR) by using the FePt-oxide granular layer/pure FePt islandlike initial nucleus layer/networklike upheaval underlayer.
AB - Search for amorphous materials with high crystallization temperature and investigation of crystal orientation, surface morphology, and composition distribution of MgO/bcc-Cr80Mn20/amorphous-Co60W40 underlayer were conducted. As a result, the crystallization temperature of amorphous-Co60W40 is higher than 620 °C and it proved to be suitable as texture inducing layer material. Also, it was found that a network-shaped upheaval structure corresponding to the grain size of the (002) plane oriented CrMn grains was formed on the surface of the (002) plane oriented MgO layer. By utilizing the surface roughness of the underlayer, we proposed a columnar isolated granular medium for heat-assisted magnetic recording (HAMR) by using the FePt-oxide granular layer/pure FePt islandlike initial nucleus layer/networklike upheaval underlayer.
KW - FePt granular media
KW - grain boundary diffusion of amorphous-Co60W40
KW - surface morphology of MgO layer
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U2 - 10.1109/TMAG.2019.2906254
DO - 10.1109/TMAG.2019.2906254
M3 - Article
AN - SCOPUS:85067821860
SN - 0018-9464
VL - 55
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 7
M1 - 8705693
ER -