DocumentCode
68358
Title
A Study of Fabrication Process for L10 FePt-Based HAMR Media
Author
Jiang Feng Hu ; Cher, Kelvin M. ; Yi Yang ; Lay Geok Ng ; Hnin Yu Yu Ko ; Jian Zhong Shi ; Tie Jun Zhou
Author_Institution
Data Storage Inst., Agency for Sci., Technol. & Res., Singapore, Singapore
Volume
50
Issue
11
fYear
2014
fDate
Nov. 2014
Firstpage
1
Lastpage
4
Abstract
The effect of the fabrication process on magnetic, textural, and microstructural properties of the L10 ordered FePt heat-assisted magnetic recording media with basic structure of NiTa/MgO/X/FePt-C/FePt-SiO2 was investigated. Compared with the one-step heating process, both postannealing and two-step heating processes enhanced the chemical ordering of FePt. The two-step heating sample demonstrated improved lateral grain isolation and smaller grain sizes. Results suggested that the higher deposition temperature could improve the phase separation of FePt and SiO2, thus improving the microstructure of FePt-based granular films. Diffusion of Ta from NiTa seedlayer into MgO underlayer was also observed causing the amorphization of the MgO near the NiTa/MgO interface.
Keywords
carbon; disc drives; grain size; hard discs; heating; iron alloys; magnesium compounds; magnetic recording; nickel compounds; phase separation; platinum alloys; silicon compounds; L10 FePt-Based HAMR media fabrication process; NiTa-MgO-FePt-C-FePt-SiO2; amorphization; chemical ordering; deposition temperature; grain sizes; granular films; hard disk drives; heat-assisted magnetic recording media; lateral grain isolation; magnetic properties; microstructural properties; one-step heating process; phase separation; postannealing; seedlayer; textural properties; two-step heating processes; Coercive force; Grain size; Heat-assisted magnetic recording; Heating; Media; Microstructure; Heat-assisted magnetic recording (HAMR); L10 ordered FePt; microstructure; thermal treatment;
fLanguage
English
Journal_Title
Magnetics, IEEE Transactions on
Publisher
ieee
ISSN
0018-9464
Type
jour
DOI
10.1109/TMAG.2014.2321424
Filename
6971356
Link To Document