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Proceedings Paper

Fabrication, characterization and testing of (111) FePt L10 for heat assisted magnetic recording
Author(s): D. Karns; J. Y. Kim; B. Lu; G. Ju; X. Wu; E. Gage; A. Roy
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Paper Abstract

The fabrication, characterization and recording of granular FePt L10 (111) oriented media are discussed. The granular structure is obtained through the addition of SiO2 during the deposition. It exhibited grain sizes less than 10 nm on average after post annealing. The effect of adding SiO2 is examined in the following manner. The crystallographic structure is examined through X-ray diffraction. The microstructures of the grains are observed by transmission electron microscopy. Hysteresis loops were obtained with a custom built polar magneto optic Kerr effect magnetometer (PMOKE) with field range up to 20 kOe and a Quantum Design SQUID magnetometer with field capability up to 50 kOe. Heat assisted magnetic recording was performed utilizing a custom designed and built heat assisted magnetic recording spin stand. The heat assisted magnetic recording spin stand was utilized to examine incident laser power requirements along with applied magnetic flux density requirements for recording. Data was successfully recorded and readout on high anisotropy FePt L10 (111) media that was not writable with perpendicular magnetic recording techniques. Recording results indicate that due to the high Curie temperature and large magnetization, a large applied magnetic flux density and a high recording temperature are required for saturation recording.

Paper Details

Date Published: 20 January 2006
PDF: 6 pages
Proc. SPIE 6027, ICO20: Optical Information Processing, 60270X (20 January 2006); doi: 10.1117/12.667923
Show Author Affiliations
D. Karns, Seagate Technologies (United States)
J. Y. Kim, Seagate Technologies (United States)
B. Lu, Seagate Technologies (United States)
G. Ju, Seagate Technologies (United States)
X. Wu, Seagate Technologies (United States)
E. Gage, Seagate Technologies (United States)
A. Roy, Carnegie Mellon Univ. (United States)

Published in SPIE Proceedings Vol. 6027:
ICO20: Optical Information Processing
Yunlong Sheng; Songlin Zhuang; Yimo Zhang, Editor(s)

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