Substrate Bias Effects on Magnetic and Structural Properties of -FePt Based Recording Media

Substrate Bias Effects on Magnetic and Structural Properties of -FePt Based Recording Media

In this paper, a method to improve the magnetic and structural properties of heat-assisted magnetic recording media by applying partial substrate bias during the deposition of FePt-based recording layer is demonstrated. Although the application of a substrate bias for the entire FePt layer depositio...

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Bibliographic Details
Published in:IEEE transactions on magnetics Vol. 52; no. 7; pp. 1 - 4
Main Authors: Varghese, Binni, Cher, Kelvin Kiat Min, JiangFeng Hu, Toh Suey Li, Yinfeng Ding, Gaping Ju
Format: Journal Article
Language:English
Published: New York IEEE 01-07-2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Bias
Coercive force
Deposition
Ferrous alloys
Heat-assisted magnetic recording
Intermetallics
Iron compounds
Magnetic properties
Magnetic tape
Magnetism
Media
Platinum compounds
Substrates
magnetic recording media
magnetic thin films
sputtering
FePt media
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Summary:In this paper, a method to improve the magnetic and structural properties of heat-assisted magnetic recording media by applying partial substrate bias during the deposition of FePt-based recording layer is demonstrated. Although the application of a substrate bias for the entire FePt layer deposition deteriorated the media properties, improvements were noted when a substrate bias is selectively applied for the deposition of top portion of the FePt layer. Our experiments suggest that the compressive stress due to the ion peening in the biased deposition degrades the texture and magnetic properties of the FePt media, primarily during the initial phase of FePt film growth. On the other hand, the media fabricated by applying an optimum substrate bias for the deposition of top portion of the FePt layer showed improvements in the micro-structural and magnetic properties.
Bibliography:ObjectType-Article-1
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content type line 23
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2016.2535292