Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMAG.2013.2285938
Title: Ion implantation challenges for patterned media at areal densities over 5 tbpsi
Authors: Kundu, S.
Gaur, N.
Piramanayagam, S.N.
Maurer, S.L.
Yang, H. 
Bhatia, C.S. 
Keywords: Bit patterned media (BPM)
Ion implantation
Lateral straggle
Perpendicular magnetic recording
Issue Date: 2014
Source: Kundu, S., Gaur, N., Piramanayagam, S.N., Maurer, S.L., Yang, H., Bhatia, C.S. (2014). Ion implantation challenges for patterned media at areal densities over 5 tbpsi. IEEE Transactions on Magnetics 50 (3) : 41-46. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2013.2285938
Abstract: Ion implantation of lighter (4He+) and heavier ion species (121Sb+)) was studied to investigate their suitability in fabricating bit patterned media (BPM) for areal densities ≥ 5 Tbpsi. Conventional CoCrPt-SiO2 and the next generation high-anisotropy L10 FePt media were employed to understand the mass-dependent lateral straggle of the ions. First-order reversal curve measurement for CoCrPt-SiO2 media revealed an increase in exchange interaction in the implanted films with the increasing fluence. Interestingly, there was an order-disorder transformation of the phase for L10 FePt media upon implantation. Implantation using lighter ions resulted in a larger lateral straggle. This lateral movement of ions from the unmasked to masked regions during BPM fabrication will, furthermore, impede the process of bit isolation. In contrast, lateral straggle was reduced for heavier ions. However, this was achieved at the expense of the diffusion of host atoms displaced from their lattice positions which caused a reduction of anisotropy even in the unimplanted regions. Therefore, the requirement to strike a balance between the lateral straggle of the implanted species and the movement of host atoms to accomplish ultra-high densities in implantation-assisted-BPM recording is reported as a challenging problem. © 2014 IEEE.
Source Title: IEEE Transactions on Magnetics
URI: http://scholarbank.nus.edu.sg/handle/10635/82585
ISSN: 00189464
DOI: 10.1109/TMAG.2013.2285938
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

5
checked on Mar 26, 2018

WEB OF SCIENCETM
Citations

5
checked on Mar 26, 2018

Page view(s)

22
checked on Apr 20, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.