Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/53690
Title: Study of bit-patterned FePt media for high density magnetic recording
Authors: SHREYA KUNDU
Keywords: HAMR, FePt, bit patterned media, self-assembly, ion embedment, Penning ionization
Issue Date: 20-Jan-2014
Source: SHREYA KUNDU (2014-01-20). Study of bit-patterned FePt media for high density magnetic recording. ScholarBank@NUS Repository.
Abstract: A combination of heat assisted magnetic recording and bit patterned media has been envisaged to extend the areal density in hard disk drives beyond 1Tb/in<sup>2</sup>. In this thesis, the factors affecting self-assembly as a high density and large area nano-patterning technique on various kinds of surfaces have been established. Self-assembly of polystyrene-b-polydimethylsiloxane (PS-b-PDMS) on surfaces with roughnesses varying at angstrom-scale was carried out. The study revealed that for the attainment of self-assembly on magnetic media surfaces, a stringent control over the surface roughness is crucial. In addition, fabrication of high anisotropy and smaller-sized L1<sub>0</sub> FePt magnetic grains without spacer materials has been studied. Structural disorder induced in FePt films by low energy C<sup>+</sup> ion embedding has also been investigated. A novel scheme has been developed for achieving bit patterned FePt media by creating alternate magnetic and non-magnetic regions using large area self-assembly and low energy ion bombardment.
URI: http://scholarbank.nus.edu.sg/handle/10635/53690
Appears in Collections:Ph.D Theses (Open)

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