TY - GEN
T1 - Effect of FePt-C nucleation layer on magnetic properties and nanostructure for FePt-C / FePt-oxide stacked media
AU - Tham, Kim Kong
AU - Saito, Takashi
AU - Kushibiki, Ryosuke
AU - Saito, Shin
N1 - Funding Information:
The authors would like to thank Prof. Shigemi Mizukami and Asst. Prof. Kazuya Suzuki at the Advanced Institute for Materials Research of Tohoku University for support with the torque measurements. The torque curves were measured at the Quantum Design Japan Physical Property Measurement Laboratory established in the Graduate School of Engineering, Tohoku University.
Publisher Copyright:
© 2021 IEEE.
PY - 2021
Y1 - 2021
N2 - Magnetic properties and nanostructure for FePt-30vol%C (2 nm) / FePt-30vol%GBM (0-8 nm) stacked media was investigated. Following effects of the employment of FePt-C nucleation layer (NL) were confirmed: 1) Msave varies linearly against melting point (Tm) with value (500-600 emu/cm3) smaller than that of media without NL (500-750 emu/cm3) due to volume average of Msave for FePt-C and FePt-GBM granular layer, 2) There is no strong correlation between grain diameter (GD) and degree of ordering (Sinfilm) of the stacked media with Tm of the GBM, 3) Ku⊥film dependence on Sinfilm for media with NL shows similar behavior with that of without NL, 4) for media with the same total thickness, the smaller I110inplane for media with NL than that of without NL reveals that disorder portion in the media with NL increases, 5) the improvement of linearity in I110inplane for media with NL against total thickness suggests that the homogeneity of the media with is improved, 6) reduction of I001 inplane from XRD in-plane profile, reflected in l4θsat from the torque curve which suggests the reduction of the ratio of FePt grains with their c-axes parallel to the film plane. Further effort would be required to completely exclude the in-plane component.
AB - Magnetic properties and nanostructure for FePt-30vol%C (2 nm) / FePt-30vol%GBM (0-8 nm) stacked media was investigated. Following effects of the employment of FePt-C nucleation layer (NL) were confirmed: 1) Msave varies linearly against melting point (Tm) with value (500-600 emu/cm3) smaller than that of media without NL (500-750 emu/cm3) due to volume average of Msave for FePt-C and FePt-GBM granular layer, 2) There is no strong correlation between grain diameter (GD) and degree of ordering (Sinfilm) of the stacked media with Tm of the GBM, 3) Ku⊥film dependence on Sinfilm for media with NL shows similar behavior with that of without NL, 4) for media with the same total thickness, the smaller I110inplane for media with NL than that of without NL reveals that disorder portion in the media with NL increases, 5) the improvement of linearity in I110inplane for media with NL against total thickness suggests that the homogeneity of the media with is improved, 6) reduction of I001 inplane from XRD in-plane profile, reflected in l4θsat from the torque curve which suggests the reduction of the ratio of FePt grains with their c-axes parallel to the film plane. Further effort would be required to completely exclude the in-plane component.
KW - FePt-C
KW - FePt-oxide
KW - Heat assisted magnetic recording
KW - L10 typed FePt
KW - Nucleation layer
KW - Stacked media
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U2 - 10.1109/INTERMAG42984.2021.9580144
DO - 10.1109/INTERMAG42984.2021.9580144
M3 - Conference contribution
AN - SCOPUS:85125948271
T3 - Digests of the Intermag Conference
BT - 2021 IEEE International Magnetic Conference, INTERMAG 2021 - Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2021 IEEE International Magnetic Conference, INTERMAG 2021
Y2 - 26 April 2021 through 30 April 2021
ER -