HAMR Medium Structure Design and Its Process for Excellent Thermal Performance

Author

Jiang Feng Hu ; Jian Zhong Shi ; Tie Jun Zhou ; Cher, Kelvin M. ; Bao Xi Xu ; Rong Ji ; Bo Liu

Author_Institution

Data Storage Inst., Agency for Sci., Technol. & Res., Singapore, Singapore

Volume

50

Issue

3

fYear

2014

fDate

Mar-14

Firstpage

96

Lastpage

101

Abstract

The L1₀ ordered FePt-based medium with a novel thermal design for heat-assisted magnetic recording (HAMR) application has been demonstrated. The proposed seed-then-heat sink approach using the (001) textured Cu₃N as the underlayer to induce the MgO (200) texture at room temperature. The high temperature process for FePtX granular film deposition resulted in the decomposition of the Cu₃N to Cu and made it a suitable heat sink layer. Our approach eliminated the effect of the boundary thermal resistance and enabled a large thermal gradient during the writing process, which is critical to the FePt-based medium for HAMR application.

Keywords

decomposition; granular materials; heat sinks; iron alloys; magnetic thin film devices; platinum alloys; thermomagnetic recording; FePt; HAMR medium structure design; L1₀ ordered FePt-based medium; boundary thermal resistance; decomposition; granular film deposition; heat-assisted magnetic recording; high temperature process; seed-then-heat sink approach; temperature 293 K to 298 K; thermal gradient; thermal performance; writing process; Copper; Heat sinks; Heat-assisted magnetic recording; Heating; Temperature measurement; Writing; $L1_{0}$ ordered FePt; Heat-assisted magnetic recording (HAMR); heat sink layer; thermal design;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2013.2286615

Filename

6774999